In ΔDEF , FE = 13 and M<F=34
we have FE = 13 and F^= 34 °
so : we know cos(F^) = EF / DF so : DF = EF / cos(F^)
SO : DF = 13 / cos(34°) = 15.7 (EF = FE )
so the solution is : B) 15.7
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Find the length of the missing side. If necessary, round to the nearest tenth.
i will answer but you have to pay me ok :
180 - 90 = 90
90 / 2 = 45
so : cos(45°) = 11/c
so c = 11 / cos(45°)
so c = 15.6
so the solution is : C.15.6
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