The Cosine Rule

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Question 25
Medium

Triangle ABC with side AC = 15 cm, side BC = 12 cm, and angle C = 20 degrees.

A triangle with vertices A, B, and C. The side AC is labeled 15 cm. The side BC is labeled 12 cm. The interior angle at vertex C is labeled 20∘20^\circ20∘.

Work out the length of AB.
Give your answer to 1 decimal place.

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The Cosine Rule Questions

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