Lesson 9

In this lesson, children explore the interior angles in polygons. They learn how to partition shapes into triangles, from a single vertex with no overlapping, to find the sum of angles in different polygons. They use their angle knowledge to solve problems. There is a teaching presentation accompanied by differentiated activities with a range of fluency, reasoning and problem-solving questions.

Year 6 Mathematics

Content Descriptors

V8.4

Investigate, with and without digital technologies, angles on a straight line, angles at a point and vertically opposite angles. Use results to find unknown angles ACMMG141

V9

identify the relationships between angles on a straight line, angles at a point and vertically opposite angles; use these to determine unknown angles, communicating reasoning AC9M6M04

Differentiation:
There are three levels of differentiation in this pack: ‘working towards,’ ‘expected’ and ‘greater depth’. Level of this Pack:

Age: 11-12
Australia: Grade 6