Many experts predict that the largest increase in demand for oil in the coming years will come from increasingly industrialized economies with large population. Can this be offset by measure taken in developed nations to address the energy climate crisis? Why or why not? What potential strategies could be used to reduce the demand for energy in industrialized economies with large population?

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. 

Answer volcanic eruptionsseismic waves from earthquakes;

Earthquake waves that vibrate from side to side and up and down only through solids are known as "seismic waves."hope my answer has you : )