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Four scalene triangles inquiry

This prompt is a way of introducing the cosine rule for finding the angles in a scalene triangle. The resource includes classroom examples, teacher notes and guided questions, as well as alternative, extending prompts.

Resource details
Year level
Year 9
Purpose
Assessment tasks Student activities Teaching resource
Strand
Space
Topic
Pythagoras and trigonometry
Audience
Teachers
Format
Downloadable resource
Australian Curriculum code
AC9M9SP01
Numeracy progression
Understanding geometric properties (P7) Proportional thinking (P7)
Publisher
Inquiry Maths
Copyright
© Andrew Blair 2012-21. Creative Commons BY-NC-SA 4.0.
Keywords
cosine ratio