A polygon where all angles are equal and all side lengths are equal.

A polygon where not all angles are equal and / or not all side lengths are equal.

Interior angles are the angles formed inside a polygon by two of its sides.

Know that a regular polygon has sides that are the same length and angles that are the same size

Maths

In this unit pupil will learn perimeter as the distance around the edge of a 2D shape. They will learn perimeter is measured in units of length found by counting units and by calculating by adding the side lengths of a 2D shape. In the future unit pupils will pupils will complete and compose symmetrical shapes from two congruent shapes and investigate lines of symmetry in 2D shapes. 

In the prior unit pupils investigated ways to compose and decompose polygons. They investigated quadrilaterals with and without parallel and perpendicular sides. In this unit pupil will learn perimeter as the distance around the edge of a 2D shape. They will learn perimeter is measured in units of length found by counting units and by calculating by adding the side lengths of a 2D shape.

Perimeter

Select all of the statements that are true of polygons. 

Which of these shapes is a regular polygon? 

Which of these shapes are regular polygons? 

This shape has been made by putting number rods together. Select all of the statements that are true.

These shapes have been made by putting number rods together. Look closely at the sides shown by the lines. Which one is a regular polygon?

Select all of the statements that are true of regular polygons. 

Select all the shapes that have only straight sides. 

Select all the two-dimensional (2D) shapes.

This lesson will be removed by end of Summer Term 2025.

Know that a regular polygon has sides that are the same length and angles that are the same size

Lesson outcome

This lesson will be removed by end of Summer Term 2025.