Geometric Reasoning and Trigonometry · Geometry and Measurement

Right Angled Trigonometry

Introducing sine, cosine, and tangent ratios to find missing sides and angles.

Key Questions

  1. 1Why do the ratios of sides in a right angled triangle remain constant for a given angle?
  2. 2How do we decide which trigonometric ratio is appropriate for a specific problem?
  3. 3What is the relationship between the sine of an angle and the cosine of its complement?

National Curriculum Attainment Targets

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

Suggested Methodologies

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