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Geometric Reasoning and Trigonometry · Spring Term

Circle Theorems (Introduction)

Students will be introduced to basic circle theorems, such as the angle at the centre and circumference, and angles in a semicircle.

Key Questions

  1. Justify why the angle at the centre is twice the angle at the circumference.
  2. Explain why the angle in a semicircle is always a right angle.
  3. Predict other angle relationships within a circle based on these initial theorems.

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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