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Area of a triangle

The prompt will challenge students to think about the area of a non-right-angled triangle, using the general sine formula. They also explore the concept of proof, deepening their conceptual understanding. The resource includes classroom examples, teacher notes and guided questions.

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 sine, triangle, angle, proof, area

Curriculum alignment

Curriculum connections Critical and creative thinking, Numeracy
Strand and focus Geometry, Measurement, Algebra, Apply understanding, Build understanding
Topics Algebraic expressions, Angles and geometric reasoning
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.