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pishuonlain [190]
3 years ago
15

MATH HELP 50 POINTS

Mathematics
2 answers:
Free_Kalibri [48]3 years ago
7 0
We know that
the law of cosines establish 
c²=a²+b²-2*a*b*cos C------> cos C=[a²+b²-c²]/[2*a*b]

in this problem
a=11 units
b=11 units
c=14 units
C=angle A

cos C=[11²+11²-14²]/[2*11*11]-----> cos C=0.19008
C=arc cos (0.19008)------> C=79.04°

the answer is
the measure of angle A is 79°

Svetllana [295]3 years ago
6 0
Your answer is 79 degrees :D
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