AC9M7M05
Year 7
Mathematics
AC9M7M05 | Year 7 Mathematics: Measurement
Content Descriptor
Content descriptor 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
Strand
Measurement
Substrand
Measurement
This content descriptor sets out learning for Year 7 Mathematics. Use it to plan lessons and assessment with the Australian Curriculum v9.
Elaborations
- • Elaboration using concrete materials to demonstrate that the sum of the interior angles of a triangle is 180°; for example, using paper triangles and tearing to demonstrate that the interior angles when combined form 180°
- • Elaboration using decomposition and the angle sum of a triangle to generalise the interior angle sum of an n-sided polygon, as 180(n-2)\;=\;180n-360
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