Paxton was working on a poster of the sea-flooring spreading process. He began with mid-ocean ridges and ended with ocean trenches. Which best describes the order of the ages of the rock on his poster? Choices: The poster begins with the youngest rock and ends with the oldest The poster shows different stages of rock whose relative age can't be determined All the rock stages shown on the poster are the same age The poster begins with the oldest rock and ends with the youngest rock

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.