#### Answer

Law of cosines

#### Work Step by Step

In part (a) of the question, we came to the conclusion that SAS is given.
The first step is to use the law of cosines to find the third side of the triangle.

Published by
Pearson

ISBN 10:
978-0-13-421743-7

ISBN 13:
978-0-13421-743-7

Law of cosines

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