Question 952630
a=4b
a+b=180 degrees Substitute for a.
4b+b=180 degrees
5b=180 degrees Divide both sides by 5
b=36 degrees ANSWER 1: Angle b is 36 degrees.
a=4b=144 degrees ANSWER 2: Angle a is 144 degrees.
CHECK:
a+b=180 degrees
144 degrees + 36 degrees = 180 degrees
180 degrees = 180 degrees