Question

angle a and b are supplementary, The measure of Angle B is 10 degrees less than 4 times of the measure of A. What is the measure of Angle A?

Answer 1

a=23°45'

Explanation:

a+b=180°

b=a•4-10°

a+a•4-10°=180°

2a•4-10°=180°

2a•4= 190°

2a=190°/4

2a= 47°30'

a=47°30'/2

a= 23°45'