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If the triangle is not right-angled, and there is not a matching pair, you will need then Cosine Rule
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Is it a right-angled triangle? No Is there a matching pair? No
Use the Cosine Rule
Label the sides and angles, calling the
given angle “A” and the missing side “a”.
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Answer
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Answer
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Applying / ( B)
Use the information
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Analysing / (A)
Take Apart
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Evaluating / ( A*)
Judge it
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