A pair of angles both between or both outside two line segments that are on opposite sides of the transversal that cuts them.

Alternate angles

Maths

This unit gives pupils the opportunity to explore polygons and begin to generalise their understanding of interior/exterior angles in regular polygons. In the future unit, pupils will use the geometrical properties of a rhombus to perform various constructions

In this unit, pupils learnt how to calculate with angles at a point and angles on a straight line. In this unit, pupils extend their knowledge about angles in lines

Geometrical properties: polygons

Alternate angles are a pair of angles both between or both outside two line segments that are on {{ }} sides of the transversal that cuts them.

Which of these diagrams show a pair of alternate angles?

This diagram shows a pair of equal {{ }} alternate angles.

Because it is an interior alternate angle with the given angle.

Because it is an exterior alternate angle with the given angle.

Because it is an equal interior alternate angle with the given angle.

Because it is an equal exterior alternate angle with the given angle.

Select the correct justification for the statement. The angle marked $$m$$ is 118°.

If alternate angles are equal, then the two lines are __________.

Use this diagram to match each angle to an equal alternate angle.

The size of the angle marked $$a$$ is {{ }}°. 

The value of the angle marked $$x$$ is {{ }}°.

Which pair of line segments are parallel to each other in this diagram?

A transversal is any line that {{ }} two or more lines at distinct (different) points. 

Which of the following show a pair of corresponding angles?

This lesson will be removed by end of Summer Term 2025.

Alternate angles

Lesson outcome

This lesson will be removed by end of Summer Term 2025.