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Katen [24]
3 years ago
12

 m∠A = 42 and m∠C = 57. Find m∠B.A. 81 B. 99 C. 132 D. 147

Mathematics
1 answer:
faltersainse [42]3 years ago
5 0
A.
because the total distance of every triangle 180. Add the two other angles so 42+ 57 =99. Then you have to subtract those two combined angles to find the missing one from the total distance, which is 180. 180-99=81. the answer is A. 81
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