Measuring Angles
Measure the size of the given angles to within two degrees of their actual value.
Scale Drawings
Measure line segments and angles in geometric figures, including interpreting scale drawings.
Constructions
Construct the diagrams from the given information then check your accuracy.
Loci Land
Make scale drawings of real life situations using ruler, compasses and pencil to answer questions about loci.
Loci Construction Pairs
Match the description of the loci to the diagram of the construction.
This is the main Transum help video on Construction.
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.
Loci The Basics
A very clear demonstration of how to use a compass and a straight edge to draw common loci.
Perpendicular Bisector Video
A step-by-step guide showing how to construct the perpendicular bisector of a line segment.
Ruler and Compass Construction
A demonstration of standard ruler and compass constructions
Ruler and Compass Constructions Video
A demonstration of standard ruler and compass constructions.
Triangle Solver
Provide and three measurements for a triangle and this application will work out the remaining sides, angles and area.
Hexagon
On a full page in the back of your exercise book draw a perfectly regular hexagon.
Pentagon
On a full page in the back of your exercise book draw a perfectly regular pentagon.
Polygon Riddle 3
A 'My first is in...' riddle that describes a geometrical shape. Can you construct it?
Rotational Symmetry
Draw a pattern with rotational symmetry of order 6 but no line symmetry.
15 items are currently in this category.
Teachers might find the complete Construction Topic List useful.
In a way this topic is quite different to all of the other topics in school mathematics. It requires a practical skill as well as the understanding of the geometrical concepts. It also requires a sharp pencil, a sturdy ruler and a decent pair of compasses.
Younger children should practise using the drawing instruments to make patterns. They will then progress to constructing accurate diagrams, plans and maps.
Older pupils are taught to derive and use the standard ruler and compass constructions for the perpendicular bisector of a line segment, the perpendicular to a given line from a given point and the bisector of a given angle.
