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miahalleSendra miahalleSendra
  • 26-11-2016
  • Mathematics
Answered

Find the area of a triangle with sides of length 7 and 9 and included angle 72 degree.

Verified Answer :

alsteva alsteva
  • 29-11-2016

\(a=7,b=9,\gamma=72^o \\ \\h_a=b\sin{72^o}=8.56 \\ \\A= \frac{ah_a}{2} = \frac{7\times8.56}{2}= 29.96\)

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