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Geometric Reasoning and Trigonometry · Spring Term

Angles in Polygons

Students will calculate interior and exterior angles of regular and irregular polygons, and understand their sum.

Key Questions

  1. Explain the relationship between the number of sides of a polygon and the sum of its interior angles.
  2. Differentiate between interior and exterior angles of a polygon.
  3. Construct a method for finding the number of sides of a regular polygon given one of its angles.

National Curriculum Attainment Targets

KS3: Mathematics - Geometry and Measures
Year: Year 9
Subject: Mathematics
Unit: Geometric Reasoning and Trigonometry
Period: Spring Term

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