In ADEF, E = 52°, d = 14, and f = 9. Find e.

Chirag Mehta asked Jan 15, 2022

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Chirag Mehta asked Jan 15, 2022

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24 votes

9514 1404 393

Answer:

e ≈ 11.0

Explanation:

The law of cosines tells you ...

e² = d² +f² -2df·cos(E)

e² = 196 +81 -252cos(52°) ≈ 121.853

e ≈ √121.853 ≈ 11.04

Fjalvingh answered Jan 22, 2022

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