Question

In triangle​ ABC, the measure of angle B is 39 more than three times the measure of angle A. The measure of angle C 66 is more than the measure of angle A. Find the measure of each angle.

Answer 1

answer:

a = 15

b = 84

c = 81

steps

a+b+c=180

b=3a+39  

c=a+66    

a+3a+39+a+66=180

5a + 105 = 180

5a = 75

a = 15

b=3a+39  

b=3(15)+39  

b=45+39

b=84

c=15+66

c=81

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