Question

I don't understand this answer. Pls help​

Answer 1

Step-by-step explanation:

complementary angles are those , whose sum is <=90°

in the question it is given that (a+15)° and 2a° are complementary

therefore

(a+15)° + 2a° =90 °

a+2a+15=90°

3a° =90-15

3a°=75

a° = 25

Now,

since a=25 so (a+15) = 25+15 = 30°

2a = 2x 25 = 50°