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The Cosine Rule

The Cosine Rule

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Question 8
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A triangle PQR\, with side lengths PQ = 6\text{ km}, QR = 8\text{ km}, and PR = 7\text{ km}. The angle at vertex Q\, is labeled PQR.

A triangle PQR PQR\,PQR is shown with side lengths PQ=6 kmPQ = 6\text{ km}PQ=6 km, QR=8 kmQR = 8\text{ km}QR=8 km, and PR=7 kmPR = 7\text{ km}PR=7 km. The angle at vertex Q Q\,Q is labeled PQRPQRPQR.

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

[3]
Markscheme

The Cosine Rule Questions

  1. GCSE
  2. /Maths
  3. /The Cosine Rule

36 exam-style questions on AQA GCSE Maths The Cosine Rule. Each one has a worked solution and a mark scheme showing where the marks go.

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