Each pair of interior angle and the exterior angle
So the exterior angle = 360° - the interior angle.
Answer:
3077.2
Step-by-step explanation:
A circle's mass is found by
Pie times R^2
7^2 is 49, times 3.14 is 153.86
then you Multiply 153.86 by 20 which gives you 3077.2
I don't know really ask someone smarter than me