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Back to Prove Laws of Sines and Cosines — Problem 3 · Task Set 23

Exercises: Prove the Laws of Sines and Cosines

Grade 10·21 problems·~35 min·Common Core Math - HS Geometry·standard·hsg-srt-d-10
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Fluency Practice

1.

In triangle ABCABC, sides a=7a = 7, b=10b = 10, and included angle C=60°C = 60\degree. Use cos⁡(60°)=0.5\cos(60\degree) = 0.5. Find side cc. Round to the nearest tenth.