Answer:
40°
50°
90°
Step-by-step explanation:
sum of angle in a triangle is= 180°
(50-x)° + (9x-40)° + 90° = 180°
50-x+9x-40 + 90 = 180
50- 40 +90 -x+9x =180
100 + 8x = 180
8x = 180 -100
8x = 80
x = 80/8 =10
x = 10°
measure of a= (50-x) = 50- 10 = 40°
measure of b = (9x-40)= 90- 40= 50°
measure of c = 90°
