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A contractor is building a house. He first marks out three points A,B and C on the ground such that AB=5m,AC=7 m and angle BAC=112°. find the length of BC.

HELP NEEDED PLEASEA contractor is building a house He first marks out three points AB and C on the ground such that AB5mAC7 m and angle BAC112 find the length o class=

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IGotChillsTheyreX
For this, you will need to use the Law of Cosines. You should plug it in as show :

Square root of((5^2+7^2-2(5)(7)cos(112)))
You will take that answer, and square it. Once plugged into a calculator, the answer is:

42.0821 meters

I hope this Helps!
ripjaw12083134
10.03.........................

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