Answer:
Smaller angle = 70 degrees
Step-by-step explanation:
Supplementary angles = add up to 180 degrees
let x = bigger angle
smaller angle = (x/2) + 15
x + (x/2) + 15 = 180
x + 0.5x + 15 = 180
1.5x = 165
x = 110
180 - 110 = 70
or
(x/2) + 15 = (110/2) + 15 = 55 + 15 = 70
