Answer:
concave pentagon
Step-by-step explanation:
its already rounded to the nearest hundredth
A=8B
A+B=180
8B+B=180°
9B=180°
B=20°
so
angle A =8×20=160°
angle B= 20°
4 I think
hope this help's
you're right
:)
144
-0- Easy :D