The Cosine Rule
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A triangle XYZ\, with side lengths XY = 12\text{ m}, YZ = 15\text{ m}, and XZ = 10\text{ m}. The angle at vertex Y\, is labeled XYZ.

A triangular garden XYZ XYZ\,XYZ has side lengths XY=12 mXY = 12\text{ m}XY=12 m, YZ=15 mYZ = 15\text{ m}YZ=15 m, and XZ=10 mXZ = 10\text{ m}XZ=10 m.

Work out the size of angle XYZXYZXYZ.
Give your answer to the nearest degree.

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The Cosine Rule Questions

Practise AQA GCSE Maths The Cosine Rule with exam-style questions for Foundation and Higher tier. 44 questions, matched to the AQA GCSE Maths (8300) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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The Cosine Rule Questions

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