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An explanation of how to classify triangles by looking at their angles and lengths of sides. The resource includes explanations, videos, worked examples and questions.
|Teaching resource, Student task
|Teaching strategies and pedagogical approaches
|Triangles, Length of sides, Angles
|Critical and creative thinking
|Strand and focus
|Angles and geometric reasoning
|AC: Mathematics (V9.0) content descriptions
Demonstrate that the interior angle sum of a triangle in the plane is 180° and apply this to determine the interior angle sum of other shapes and the size of unknown angles
Classify triangles, quadrilaterals and other polygons according to their side and angle properties; identify and reason about relationships
Understanding geometric properties (P4, P6)
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