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Sum of interior angles in a polygon
This resource consists of a series of student-based discovery activities that explores the sum of the interior angles of a polygon by deconstructing the polygons into triangles. The investigation continues to generalisation.
|Year level(s)||Year 7|
|Purpose||Student task, Teaching resource|
|Teaching strategies and pedagogical approaches||Concrete Representational Abstract model|
|Keywords||Polygon, Interior, Angles, Triangle|
|Curriculum connections||Critical and creative thinking, ICT general capability|
|Strand and focus||Space|
|Topics||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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