A quadrilateral is a polygon with four straight sides and four vertices.

A vertex is the point where two lines meet. The plural is vertices.

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

Make and draw quadrilaterals on circular geoboards

Maths

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.

Parallel and perpendicular sides in polygons (and perimeter)

Four vertices, one pair of perpendicular sides and no parallel sides.

Four vertices, one pair of perpendicular sides, one pair of parallel sides.

Four vertices, no perpendicular sides and no parallel sides.

Select the properties of this polygon drawn on a circular grid.

Select the parallelograms which are not rectangles.

The number of pairs of perpendicular sides they have.

The number of pairs of parallel sides they have.

What is the difference between a parallelogram and a trapezium?

Match the shape name to the number of vertices it has.

True or false? These lines are all parallel to one another.

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

Complete the sentence. This polygon has {{ }} pairs of parallel sides.

Select the correct three shapes the pentagon has been decomposed into.

Starter Quiz