Asked by Zarina

To the nearest meter, find the length of side DE in triangle DEF, given angle F=54 degrees, side DF=70 m, and side EF=50 m.

Please show work!

Answers

Answered by Reiny
cosine law:
DE^2 = 70^2 + 50^2 - 2(70)(50)cos54°
= ..

carry on
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