Answer:
75.4
Step-by-step explanation:
just follow the formula.
G(x1,y1)= (-4,-8)
H(x2,y2)=(-15,-3)
Slope = (y2-y1)/(x2-x1)
=(-3-(-8))/ (-15-(-4))
= (-3+8)/(-15+4)
=5/-11
The measure of exterior angle is 6 is 122
10.5