Answer:
10° and 80°
Step-by-step explanation:
All triangles have internal angles that always add up to 180°.
11.2
It would be 16 divided by 3 and from the answer you get from that you should divide it by itself equaling infinite .111111111111etc
63*42=2646
22*22=484
Area of Shaded Gray portion=2646-484=2162
