The San Andreas Fault is probably the most famous fault line in the world. Marking the boundary between the North American and Pacific tectonic plates, it runs 1,300 kilometers up the California coast, from the Imperial Valley, 150 miles east of Los Angeles, through San Francisco, and up to the Oregon border. The fault has been responsible for a number of memorable A. Tornadoes

B. Volcanoes

C. Earthquakes

D. Mudslides

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. 

Round it to the nearest tenth