Answer:
m<GEP=72
Step-by-step explanation:
You have to solve for x first before you can find the exterior angle measure. The equation is: 6x+6x+(180-(10x+12))=180 to find x. Once x is found, you can substitute x in to find m<GEP
x=6
substitute x into the exterior angle
10(6)+12
60+12=72
