Answers Fall 24 GMS Geometry Concepts and Connections BLaw of Sines (Sec 8-3)

Law of Cosines Answers

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In ΔDEF, DE = 11, EF = 9, and angle E = 140°. Which equation correctly uses the law of cosines to solve for the third side?

A

e2 = 112 + 92 − 2(11)(9)cos(140°)

B

112 = e2 + 92 − 2e(9)cos(140°)

C

92 = e2 + 112 − 2e(11)cos(140°)

D

e = 11 + 9 − 2(11)(9)cos(140°)

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Answer:

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Law of Cosines Answers — Fall 24 GMS Geometry…