Maths

Y9 Maths

Key Stage 3

Year 9

Angle review (9.5a)

In this lesson, we will review that the internal angles in a triangle sum to 180 degrees.

Angles in triangles

In this lesson, we will review that the total interior angles of polygons are made up of many triangles, and that this relationship is determined by the number of sides the polygon has.

Angles in polygons

In this lesson, we will review how straight line angles sum to 180 degrees, and how angles around a point sum to 360 degrees.

Straight line angles and angles around a point

In this lesson, we will review the various angle facts that appear with a transversal and parallel lines.

Key Stage 3, Maths, Angle review (9.5a)

Angles in triangles

Angles in polygons

Straight line angles and angles around a point

Angles in parallel lines