What shaped the economic, social, and political development of greek civilization? a. the physical geography of the aegean basin b. the physical geography of the atlantic basin c. the birth of christianity d. the birth of judaism

Quizlet has the answer

I'm pretty sure there's a geometry rule for   anyways, if the triangle is equilateral, and the circle is circumscribed, the circle is outside of the triangle.  to find the area, you need the radius.  the radius should be a straight line from the center of the triangle to any of it's points.  draw lines from the center of the circle to each of the triangle points.  draw three more lines from the center to the middle of the sides of the triangle.  you should now have six separate 30-60-90 triangles inside of your original triangle. use your 30-60-90 rules to solve for the radius, then the circumference. 

The answer is it can create volcanoes .