The Cosine Rule WORKSHEET
Suitable for Year groups: Year 10, Year 11
GCSE Tier: Higher
Targeting grades: 6-7
Prerequisite knowledge: 2D shapes, angles, rearranging formulae, using a calculator.
Learning Objective: Finding missing lengths and angles using the cosine rule
The Cosine Rule WORKSHEET DESCRIPTION
This worksheet provides some purposeful practice for finding the missing angles and lengths of triangles using the cosine rule.
Section A has three questions where a missing side is required when given the other two sides and the included angle.
Section B requires learners to calculate an angle given all three sides.
Section C has a mixed set of questions, and section D requires missing values from compound shapes.
All worksheets are created by the team of experienced teachers at Cazoom Maths.
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Finding missing lengths and angles using the cosine rule