swaggerjagga18 swaggerjagga18

22-10-2018
Mathematics

contestada

m∠A = 42 and m∠C = 57. Find m∠B.
A. 81

B. 99

C. 132

D. 147

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thefishypig01 thefishypig01

22-10-2018

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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