There are 366 different Starters of The Day, many to choose from. You will find in the left column below some starters on the topic of Geometry. In the right column below are links to related online activities, videos and teacher resources.

A lesson starter does not have to be on the same topic as the main part of the lesson or the topic of the previous lesson. It is often very useful to revise or explore other concepts by using a starter based on a totally different area of Mathematics.

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### Geometry Starters:

Angle Estimates: Estimate the sizes of each of the angles then add your estimates together.

Area Two: How many different shapes with an area of 2 square units can you make by joining dots on this grid with straight lines?

Christmas Tables: Which of the two shapes has the largest area? You will be surprised!

Cross Perimeter: Calculate the distance around the given shape

Dice Reflections: A dice is reflected in two mirrors. What numbers can be seen?

Hexagon: On a full page in the back of your exercise book draw a perfectly regular hexagon.

Mathterpiece: Memorise a picture made up of geometrical shapes

Oblongs: Find the dimensions of a rectangle given the perimeter and area.

Pentagon: On a full page in the back of your exercise book draw a perfectly regular pentagon.

Polygon Riddle 1: Solve the riddle to find the name of the polygon then sum the interior angles.

Quad Areas: Calculate the areas of all the possible quadrilaterals that can be constructed by joining together dots on this grid.

Reflective Cat: On squared paper copy the drawing of the face then reflect it in three different lines.

Rotational Symmetry: Draw a pattern with rotational symmetry of order 6 but no line symmetry.

Sectors: Work out which sectors fit together to make complete circles. Knowledge of the sum of the angles at a point will help find more than one correct solution to this puzzle.

Square Angles: Find a trapezium, a triangle and a quadrilateral where all of the angles are square numbers.

Square Circle Kite: Write down the names of all the mathematical shapes you know.

Stair Perimeter: Use the information implied in the diagram to calculate the perimeter of this shape.

Step Perimeter: Is it possible to work out the perimeter of this shape if not all the side lengths are given?

Curved Angles: How many right angles are there in a semicircle?

Find The Radius: Find the radius of the circle from the small amount of information provided.

Geometry Snack: Find the value of the marked angle in this diagram from the book Geometry Snacks

Quad Midpoints: What shape is created when the midpoints of the sides of a quadrilateral are joined together?

Three Right Triangles: Calculate the lengths of the unlabelled sides of these right-angled triangles.

#### Estimating Angles

Estimate the size of the given acute angles in degrees.

Transum.org/go/?to=estang

### Curriculum for Geometry:

#### Year 5

Pupils should be taught to use the properties of rectangles to deduce related facts and find missing lengths and angles more...

Pupils should be taught to distinguish between regular and irregular polygons based on reasoning about equal sides and angles more...

#### Year 6

Pupils should be taught to draw 2-D shapes using given dimensions and angles more...

Pupils should be taught to compare and classify geometric shapes based on their properties and sizes and find unknown angles in any triangles, quadrilaterals, and regular polygons more...

Pupils should be taught to recognise angles where they meet at a point, are on a straight line, or are vertically opposite, and find missing angles. more...

#### Years 7 to 9

Pupils should be taught to draw and measure line segments and angles in geometric figures, including interpreting scale drawings more...

Pupils should be taught to describe, sketch and draw using conventional terms and notations: points, lines, parallel lines, perpendicular lines, right angles, regular polygons, and other polygons that are reflectively and rotationally symmetric more...

Pupils should be taught to use the standard conventions for labelling the sides and angles of triangle ABC, and know and use the criteria for congruence of triangles more...

Pupils should be taught to derive and illustrate properties of triangles, quadrilaterals, circles, and other plane figures [for example, equal lengths and angles] using appropriate language and technologies more...

Pupils should be taught to identify and construct congruent triangles, and construct similar shapes by enlargement, with and without coordinate grids more...

Pupils should be taught to apply the properties of angles at a point, angles at a point on a straight line, vertically opposite angles more...

Pupils should be taught to derive and use the sum of angles in a triangle and use it to deduce the angle sum in any polygon, and to derive properties of regular polygons more...

Pupils should be taught to apply angle facts, triangle congruence, similarity and properties of quadrilaterals to derive results about angles and sides, including Pythagorasâ€™ Theorem, and use known results to obtain simple proofs more...

Pupils should be taught to interpret mathematical relationships both algebraically and geometrically. more...

#### Years 10 and 11

Pupils should be taught to identify and apply circle definitions and properties, including: centre, radius, chord, diameter, circumference, tangent, arc, sector and segment more...

Pupils should be taught to {apply and prove the standard circle theorems concerning angles, radii, tangents and chords, and use them to prove related results} more...

Pupils should be taught to construct and interpret plans and elevations of 3D shapes more...

Pupils should be taught to calculate arc lengths, angles and areas of sectors of circles more...

Pupils should be taught to apply the concepts of congruence and similarity, including the relationships between lengths, {areas and volumes} in similar figures more...

#### International Baccalaureate

See the Geometry and Trigonometry sub-topics, syllabus statements, exam-style questions and learning resources for the IB AA course here.

### Exam-Style Questions:

There are almost a thousand exam-style questions unique to the Transum website.

### Feedback:

Comment recorded on the 28 May 'Starter of the Day' page by L Smith, Colwyn Bay:

"An absolutely brilliant resource. Only recently been discovered but is used daily with all my classes. It is particularly useful when things can be saved for further use. Thank you!"

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"Excellent. Thank you very much for a fabulous set of starters. I use the 'weekenders' if the daily ones are not quite what I want. Brilliant and much appreciated."

Comment recorded on the 1 February 'Starter of the Day' page by Terry Shaw, Beaulieu Convent School:

"Really good site. Lots of good ideas for starters. Use it most of the time in KS3."

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"I would like to thank you for the excellent resources which I used every day. My students would often turn up early to tackle the starter of the day as there were stamps for the first 5 finishers. We also had a lot of fun with the fun maths. All in all your resources provoked discussion and the students had a lot of fun."

Comment recorded on the 12 July 'Starter of the Day' page by Miss J Key, Farlingaye High School, Suffolk:

"Thanks very much for this one. We developed it into a whole lesson and I borrowed some hats from the drama department to add to the fun!"

Comment recorded on the 10 September 'Starter of the Day' page by Carol, Sheffield PArk Academy:

"3 NQTs in the department, I'm new subject leader in this new academy - Starters R Great!! Lovely resource for stimulating learning and getting eveyone off to a good start. Thank you!!"

Comment recorded on the 5 April 'Starter of the Day' page by Mr Stoner, St George's College of Technology:

"This resource has made a great deal of difference to the standard of starters for all of our lessons. Thank you for being so creative and imaginative."

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"I am thankful for providing such wonderful starters. They are of immence help and the students enjoy them very much. These starters have saved my time and have made my lessons enjoyable."

Comment recorded on the 2 May 'Starter of the Day' page by Angela Lowry, :

"I think these are great! So useful and handy, the children love them.
Could we have some on angles too please?"

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"A really awesome website! Teachers and students are learning in such a fun way! Keep it up..."

Comment recorded on the 24 May 'Starter of the Day' page by Ruth Seward, Hagley Park Sports College:

"Find the starters wonderful; students enjoy them and often want to use the idea generated by the starter in other parts of the lesson. Keep up the good work"

Comment recorded on the 14 October 'Starter of the Day' page by Inger Kisby, Herts and Essex High School:

"Just a quick note to say that we use a lot of your starters. It is lovely to have so many different ideas to start a lesson with. Thank you very much and keep up the good work."

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Keep it up and thank you!"

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"We recently had an afternoon on accelerated learning.This linked really well and prompted a discussion about learning styles and short term memory."

Comment recorded on the 19 October 'Starter of the Day' page by E Pollard, Huddersfield:

"I used this with my bottom set in year 9. To engage them I used their name and favorite football team (or pop group) instead of the school name. For homework, I asked each student to find a definition for the key words they had been given (once they had fun trying to guess the answer) and they presented their findings to the rest of the class the following day. They felt really special because the key words came from their own personal information."

Comment recorded on the 14 September 'Starter of the Day' page by Trish Bailey, Kingstone School:

"This is a great memory aid which could be used for formulae or key facts etc - in any subject area. The PICTURE is such an aid to remembering where each number or group of numbers is - my pupils love it!
Thanks"

Comment recorded on the 3 October 'Starter of the Day' page by Mrs Johnstone, 7Je:

"I think this is a brilliant website as all the students enjoy doing the puzzles and it is a brilliant way to start a lesson."

Comment recorded on the 21 October 'Starter of the Day' page by Mr Trainor And His P7 Class(All Girls), Mercy Primary School, Belfast:

"My Primary 7 class in Mercy Primary school, Belfast, look forward to your mental maths starters every morning. The variety of material is interesting and exciting and always engages the teacher and pupils. Keep them coming please."

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Comment recorded on the 17 November 'Starter of the Day' page by Amy Thay, Coventry:

"Thank you so much for your wonderful site. I have so much material to use in class and inspire me to try something a little different more often. I am going to show my maths department your website and encourage them to use it too. How lovely that you have compiled such a great resource to help teachers and pupils.
Thanks again"

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"This website was brilliant. My class and I really enjoy doing the activites."

Comment recorded on the 16 March 'Starter of the Day' page by Mrs A Milton, Ysgol Ardudwy:

"I have used your starters for 3 years now and would not have a lesson without one! Fantastic way to engage the pupils at the start of a lesson."

Comment recorded on the 25 June 'Starter of the Day' page by Inger.kisby@herts and essex.herts.sch.uk, :

"We all love your starters. It is so good to have such a collection. We use them for all age groups and abilities. Have particularly enjoyed KIM's game, as we have not used that for Mathematics before. Keep up the good work and thank you very much
Best wishes from Inger Kisby"

Comment recorded on the 3 October 'Starter of the Day' page by Fiona Bray, Cams Hill School:

"This is an excellent website. We all often use the starters as the pupils come in the door and get settled as we take the register."

Comment recorded on the 1 May 'Starter of the Day' page by Phil Anthony, Head of Maths, Stourport High School:

"What a brilliant website. We have just started to use the 'starter-of-the-day' in our yr9 lessons to try them out before we change from a high school to a secondary school in September. This is one of the best resources on-line we have found. The kids and staff love it. Well done an thank you very much for making my maths lessons more interesting and fun."

Comment recorded on the 18 September 'Starter of the Day' page by Mrs. Peacock, Downe House School and Kennet School:

"My year 8's absolutely loved the "Separated Twins" starter. I set it as an optional piece of work for my year 11's over a weekend and one girl came up with 3 independant solutions."

Comment recorded on the 1 August 'Starter of the Day' page by Peter Wright, St Joseph's College:

"Love using the Starter of the Day activities to get the students into Maths mode at the beginning of a lesson. Lots of interesting discussions and questions have arisen out of the activities.
Thanks for such a great resource!"

Comment recorded on the 23 September 'Starter of the Day' page by Judy, Chatsmore CHS:

"This triangle starter is excellent. I have used it with all of my ks3 and ks4 classes and they are all totally focused when counting the triangles."

Comment recorded on the 1 February 'Starter of the Day' page by M Chant, Chase Lane School Harwich:

"My year five children look forward to their daily challenge and enjoy the problems as much as I do. A great resource - thanks a million."

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To the creator of this website and all of those teachers who have contributed to it, I would like to say a big THANK YOU!!! :)."

### Notes:

Geometry is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space. Geometry arose independently in a number of early cultures as a body of practical knowledge concerning lengths, areas, and volumes, with elements of a formal mathematical science emerging in the West as early 6th Century BC.

See also the topics of Angles, Area, Bearings, Circles, Enlargements, Mensuration, Pythagoras, Shape, Shape (3D), Symmetry, Transformations and Trigonometry.

### Geometry Teacher Resources:

Kite Maths: Can you make a kite shape from a single A4 size sheet of paper using only three folds?

Polygons: Name the polygons and show the number of lines and order of rotational symmetry.

Angle Theorems: Diagrams of the angle theorems with interactive examples.

Circle Parts Kim's Game: A memory game to be projected to help the whole class revise the names for the parts of a circle.

Polygon Angles Animation: Barbara Bug walks around a regular hexagon turning through each of the exterior angles as she goes.

Pin Board: Rows and columns of dots that can be joined using straight lines to create shapes.

Circle Theorems: Diagrams of the circle theorems to be projected onto a white board as an effective visual aid.

Geometry Toolbox: Create your own dynamic geometrical diagrams using this truly amazing tool from GeoGebra.

### Geometry Activities:

Estimating Angles: Estimate the size of the given acute angles in degrees.

Area of a Triangle: Calculate the areas of the given triangles in this self marking quiz.

Angle Points: Apply the properties of angles at a point, angles on a straight line and vertically opposite angles.

Angles in a Triangle: A self marking exercise involving calculating the unknown angle in a triangle.

Area Maze: Use your knowledge of rectangle areas to calculate the missing measurement of these composite diagrams.

Area Two: How many different shapes with an area of 2 square units can you make by joining dots on this grid with straight lines?

Polygons: Name the polygons and show the number of lines and order of rotational symmetry.

Angle Parallels: Understand and use the relationship between parallel lines and alternate and corresponding angles.

Angle Chase: Find all of the angles on the geometrical diagrams.

Quad Areas: Calculate the areas of all the possible quadrilaterals that can be constructed by joining together dots on this grid.

Volume: Use formulae to solve problems involving the volumes of cuboids, cones, pyramids, prisms and composite solids.

Measuring Units: Check your knowledge of the units used for measuring with this self-marking quiz about metric and imperial units.

Transformations: Draw transformations online and have them instantly checked. Includes reflections, translations, rotations and enlargements.

Polygon Angles: A mixture of problems related to calculating the interior and exterior angles of polygons.

Polygon Pieces: Arrange the nine pieces of the puzzle on the grid to make different polygons.

Polybragging: The Transum version of the Top Trumps game played online with the properties of polygons.

Areas of Composite Shapes: Find the areas of combined (composite) shapes made up of one or more simple polygons and circles.

Circle Theorems Exercise: Show that you understand and can apply the circle theorems with this self marking exercise.

Polygon Properties: Connect the names of the polygons with the descriptions of their properties.

Formulae Pairs: Find the matching pairs of diagrams and formulae for basic geometrical shapes.

Congruent Triangles: Test your understanding of the criteria for congruence of triangles with this self-marking quiz.

Angles Mixed: Find the unknown angles by using the basic angle theorems.

Proof of Circle Theorems: Arrange the stages of the proofs for the standard circle theorems in the correct order.

Geometry Toolbox: Create your own dynamic geometrical diagrams using this truly amazing tool from GeoGebra.

Surface Area: Work out the surface areas of common solid shapes in this collection of exercises.

Congruent Parts: Use the colours to dissect the outlines into congruent parts.

Similar Parts: Use the colours to dissect the outlines into similar parts.

Finally there is Topic Test, a set of 10 randomly chosen, multiple choice questions suggested by people from around the world.

### Geometry Investigations:

Polygon Areas: Investigate which polygons have an area of 4 square units on this interactive dotty grid.

Area shapes: Investigate polygons with an area of 4 square units. This is your starting point, you can decide how to proceed.

Pin Board: Rows and columns of dots that can be joined using straight lines to create shapes.

Tessellations: Drag the shapes onto the canvas to create tessellating patterns then try the tessellations quiz.

How Many Rectangles?: Investigate the number of rectangles on a grid of squares. What strategies will be useful in coming up with the answer?

Rectangle Perimeters: The perimeter of a rectangle is 28cm. What could its area be?

Polygon Hunting: Find all the polygons that can be drawn by joining dots on this seven dot grid.

Maxvoltray: Find the maximum volume of a tray made from an A4 sheet of paper. A practical mathematical investigation.

### Geometry Videos:

Transum's Geometry Video

Angle Points Video: See a demonstration of angles in a full turn around a point, angles together on a straight line and vertically opposite angles.

Parallelogram: Instructional video showing how the area of a parallelogram can be determined.

Different types of Triangle: Euclid and his friends explain how many different kinds of triangle there are.

Construct a congruent triangle: Construction (with compass and straight edge) of a triangle congruent to a given triangle.

Polygon Angles Video: A concise reminder about angles, both interior and exterior, in regular and irregular polygons.

Naming Polygons: An exploration of the terminology, etymology and structure of naming polygons

Congruent Triangles Video: Learn the conditions for two triangles to be congruent and then use this information to solve problems.

### Geometry Worksheets/Printables:

Tridots Worksheet: A printable set of three by three dotty grids to use with the Tridots challenge.

Angle Chase Worksheets: A set of printable Angle Chase sheets on which pupils fill in the missing angles.

Polybragging Cards: Printable cards for the Polybragging game. Use the properties of polygons to win.

Links to other websites containing resources for Geometry are provided for those logged into 'Transum Mathematics'. Subscribing also opens up the opportunity for you to add your own links to this panel. You can sign up using one of the buttons below:

### Search

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### Other

Is there anything you would have a regular use for that we don't feature here? Please let us know.

#### Similar Parts

Use the colours to dissect the outlines into similar parts.

Transum.org/go/?to=smlprts

### Teaching Notes:

Many Transum activities have notes for teachers suggesting teaching methods and highlighting common misconceptions. There are also solutions to puzzles, exercises and activities available on the web pages when you are signed in to your Transum subscription account. If you do not yet have an account and you are a teacher, tutor or parent you can apply for one by completing the form on the Sign Up page.

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