Investigate and draw other polygons with right angles

Maths

In this unit pupils will rotate two lines around a fixed point to make different sized angles. They will identify vertices. In the future unit pupils will investigate ways to compose and decompose polygons. They will investigate quadrilaterals with and without parallel and perpendicular sides.

In the prior unit pupils ordered and arranged combinations of objects in patterns and sequences. They consolidated understanding of whole, half, quarter and three-quarter turns, in terms of right angles, using mathematical vocabulary to describe position, direction and movement. In this unit pupils will rotate 2 lines around a fixed point to make different sized angles. They will identify vertices

Right angles

Look at this pentagon. How many right angles does it have? 

Look at this hexagon. How many right angles does it have? 

Yes, the shape is a hexagon with four right angles.

No, the shape is a hexagon, but it doesn’t have four right angles.

Aisha uses six sticks of equal length to make the shape below. She says, ‘I’ve made a hexagon with four right angles.’ Is she correct? 

Laura chooses three of these shapes. The shapes have a total of five right angles. Which three shapes did she choose? 

Which of these shapes has exactly one right angle?

Which of these shapes has exactly two right angles?

Which of these shapes does not have any right angles?

How many right angles does this shape have?

Which of these shapes are not quadrilaterals?

Rectangles and squares are different because rectangles do not have right angles

This lesson will soon be taken down.

Investigate and draw other polygons with right angles

Lesson outcome