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# reSolve: Spatial Reasoning: Right Angles

In this sequence of two lessons, students create and identify right angles. In the first lesson, students use popsicle sticks to create right angles and investigate how many right angles can be created for a given number of sticks. Students then go on to create eight-sided polygons with different combinations of internal right angles. Each lesson is outlined in detail including curriculum links, vocabulary, materials needed, sample answers, discussion points and student resources. This sequence is part of the reSolve: Mathematics by Inquiry program.

Year level(s) Year 6
Audience Teacher
Purpose Teaching resource
Teaching strategies and pedagogical approaches Mathematics investigation
Keywords right angles, angles, shapes, polygons

## Curriculum alignment

Curriculum connections Numeracy
Strand and focus Build understanding, Apply understanding, Space
Topics Angles and geometric reasoning
AC: Mathematics (V9.0) content descriptions
AC9M6M04
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

Numeracy progression Understanding geometric properties (P5)
Understanding units of measurement (P8)