An asteroid has hit the earth and created a huge crater. engineers and scientists hove measured around the crater to be 79.5 miles. how much of the surfoce of the earth hos been effected by the crater impact?

The measurement around the crater is the circumference. We need to find the radius so we can find the area fo the crater.


Plug in values
79.5=2*(3.14)r

Multiply 2 and 3.14

79.5 = 6.28r

Divide both sides by 6.28

r approximately 12.66 miles

Area of a circle 



Plug in values

A=(3.14)*12.66^2

Area = approximately 503.27 Sq Miles