A polygon is a 2D shape made up of three or more straight lines.

Two lines which meet at a right angle are perpendicular.

Parallel lines are straight lines that are always the same distance apart. They never get closer together or further apart.

Construct quadrilaterals with and without parallel and perpendicular sides

Maths

Make shapes by joining two polygons in different ways

Investigate different ways of decomposing a polygon

Draw polygons on isometric paper

Make and draw shapes with and without parallel and perpendicular sides

Identifying parallel lines

Make and draw triangles on circular geoboards

Make and draw quadrilaterals on circular geoboards

Draw shapes with given properties

Draw shapes with given properties on a range of geometric grids

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

In this unit pupils will investigate ways to compose and decompose polygons. They will investigate quadrilaterals with and without parallel and perpendicular sides.

Parallel and perpendicular sides in polygons

Match the start and end of the statements correctly.

This quadrilateral has one right angle.
What else do you know?

Which statements about this polygon are true?

is the number of pairs of parallel sides.

is the number of pairs of perpendicular sides.

Look at this quadrilateral.
Match the properties with the correct numbers

Both polygons have one pair of parallel sides.

Both polygons have one pair of perpendicular sides

Look at the polygons. Which statements are true?

Both polygons have two pairs of parallel sides.

Both polygons have two pairs of perpendicular sides.

How many pairs of parallel sides do these shapes have? Match the shape with the correct number of pairs of parallel sides.

How many pairs of perpendicular sides do these shapes have? Match the shape with the correct number of pairs of perpendicular sides.

Look at this polygon. Match the different properties to the correct number.

How many pairs of parallel sides does this polygon have? {{ }} pairs of parallel sides.

How many pairs of perpendicular sides does this polygon have? {{ }} pairs of perpendicular sides.

Starter Quiz

Select the triangles.