Isometric means distances between points stay the same. In this lesson we use isometric paper which has equally spaced dots or points.

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.

Draw polygons on isometric paper

Maths

Make shapes by joining two polygons in different ways

Investigate different ways of decomposing a polygon

Construct quadrilaterals with and without parallel and perpendicular sides

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

The lines on the isometric paper are __________ because they stay the same distance apart.

It has three pairs of perpendicular sides.

Izzy drew this polygon on isometric paper.
Which of these statements is not true?

True or false.
The number of right angles in a shape is the same as the number of pairs of perpendicular sides.

two pairs of parallel sides, no right angles, no perpendicular sides.

four right angles and two pairs of parallel sides.

one pair of parallel sides, no right angles, no perpendicular sides.

no parallel sides or perpendicular sides.

Match each shape to the correct description.

Look at the polygon drawn on isometric paper. Match the number with the description.

Match the shape with the number of right angles that it has.

Which of these shapes are quadrilaterals?

Look at the image of the quadrilateral and correctly match the parts of the statements.

Look at this pentagon.
Which statements are true?

They all have at least one pair of perpendicular sides.

They all have at least one pair of parallel sides.

Look at this polygon. Which statements are true?

Draw polygons on isometric paper

Lesson outcome