Scalene triangles Image

Please note: This site contains links to websites not controlled by the Australian Government or ESA. More information here.

Go to website

Scalene triangles

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.

Additional details

Year level(s) Year 10
Audience Teacher
Purpose Assessment task, Extension, Student task, Teaching resource
Format Downloadable resources
Teaching strategies and pedagogical approaches Collaborative learning, Differentiated teaching, Explicit teaching, Feedback, Mathematics investigation
Keywords scalene, triangle, trigonometry, cosine rule, angles

Curriculum alignment

Curriculum connections Critical and creative thinking, Numeracy
Strand and focus Geometry, Build understanding, Apply understanding
Topics Pythagoras and trigonometry
AC: Mathematics content descriptions
ACMMG273 Establish the sine, cosine and area rules for any triangle and solve related problems

Copyright details


Inquiry Maths


© Andrew Blair 2012-21. Creative Commons BY-NC-SA 4.0.