Answer:
Measure of exterior angle = 68°
Step-by-step explanation:
By exterior angle property of a triangle.
(7x - 16)°= (x + 8)° + (4x)°
(7x - 16)°= (x + 8 + 4x)°
(7x - 16)° = (5x + 8)°
7x - 16 = 5x + 8
7x - 5x = 8 + 16
2x = 24
x = 24/2
x = 12
Measure of exterior angle
= (7x - 16)°
=(7*12 - 16)°
= (84 - 16)°
Measure of exterior angle = 68°
