A quadrilateral with two pairs of adjacent, equal sides.

If you were to fold a shape on its line of symmetry, both halves would match exactly.

Investigate lines of symmetry in 2D shapes by folding

Maths

In this unit pupils will pupils will complete and compose symmetrical shapes from two congruent shapes and investigate lines of symmetry in 2D shapes. In the future unit pupils will explain what area is and measure using counting as a strategy. They will make different shapes with the same area and compare the area of different 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 pupils will complete and compose symmetrical shapes from two congruent shapes and investigate lines of symmetry in 2D shapes.

Properties of 2D and 3D shapes and symmetry

A __________ is a quadrilateral with two pairs of adjacent, equal sides.

A kite has two pairs of sides that are equal in length. These pairs are adjacent sides. What does adjacent mean?

Which of these quadrilaterals are also kites?

True or false. A kite can also be a rhombus or a square.

Which of these shapes has four lines of symmetry?

Which shape has been incorrectly sorted? {{ }}

Complete the sentence. This quadrilateral has {{ }} pair(s) of parallel sides.

Which statements are true for all polygons?

Match the polygon with the number of vertices that it has.

How many lines of symmetry does this shape have?

Which of these statements are true for all rectangles?

How many vertices do all quadrilaterals have? {{ }} vertices

This lesson will soon be taken down.

Investigate lines of symmetry in 2D shapes by folding

Lesson outcome