Polygons
In this section the activities are on lines of symmetry (mirror lines).
Investigate how many side lengths you need to know to calculate the perimeter of various shapes.

Use this activity to discover the formula for calculating the area of any trianlge.

This activity allows you to investigate the area of parallelograms, and to come up with a rule for calculating the area of any parallelogram.

Investigate the area of a trapezium, and generate a formula for calculating it.

Investigate how to calculate the areas of shapes made up from other shapes, and how many lengths you need to work the area out.

In this activity investigate how these two measures of 2D shapes are related to each other in rectangles.

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