Geometry

There are 366 different Starters of The Day, many to choose from. You will find below some starters on the topic of Geometry. 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?

 

Exercises

Angle Chase

Angle Chase

Find all of the angles on the geometrical diagrams.

Angle Parallels

Angle Parallels

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

Angle Points

Angle Points

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

Angle Theorems

Angle Theorems

Diagrams of the angle theorems with interactive examples.

Angles in a Triangle

Angles in a Triangle

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

Area Maze

Area Maze

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

Area of a Triangle

Area of a Triangle

Calculate the areas of the given triangles in this self marking quiz.

Area Two

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?

Areas of Composite Shapes

Areas of Composite Shapes

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

Circle Parts Kim's Game

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.

Circle Theorems

Circle Theorems

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

Circle Theorems Exercise

Circle Theorems Exercise

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

Congruent Triangles

Congruent Triangles

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

Estimating Angles

Estimating Angles

Estimate the size of the given acute angles in degrees.

Formulae Pairs

Formulae Pairs

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

Geometry Toolbox

Geometry Toolbox

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

How Many Rectangles?

How Many Rectangles?

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

Kite Maths

Kite Maths

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

Maxvoltray

Maxvoltray

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

Measuring Units

Measuring Units

Check your knowledge of the units used for measuring with this multiple choice quiz about metric and imperial units.

Pin Board

Pin Board

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

Polybragging

Polybragging

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

Polygon Angles

Polygon Angles

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

Polygon Areas

Polygon Areas

Investigate polygons with an area of 4 sq. units. Investigate polygons with other areas.

Polygon Pieces

Polygon Pieces

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

Polygon Properties

Polygon Properties

Connect the names of the polygons with the descriptions of their properties.

Polygons

Polygons

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

Proof of Circle Theorems

Proof of Circle Theorems

Arrange the stages of the proofs for the standard circle theorems in the correct order.

Quad Areas

Quad Areas

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

Rectangle Perimeters

Rectangle Perimeters

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

Similar Shapes

Similar Shapes

Questions about the scale factors of lengths, areas and volumes of similar shapes.

Surface Area

Surface Area

Work out the surface areas of the given solid shapes.

Tantrum

Tantrum

A game, a puzzle and a challenge involving counters being placed at the corners of a square on a grid.

Transformations

Transformations

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

Vectors

Vectors

An online exercise on addition and subtraction of vectors, multiplication of vectors by a scalar, and diagrammatic representations of vectors.

Volume

Volume

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

 

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