PLEASE HELP I WILL GIVE BRAINLIEST The map shows a top view of the Mississippi River. The gap between lines 1 and 2 shows how much Saint Anthony
Falls receded between 1680 and 1766. The gap between lines 3 and 4 shows how much the falls receded between
1856 and 1876. At what rate (on average) did the falls recede during each of these time spans? Express your answer
in units of feet per year. Did the rate increase or decrease from one time span to the next?
Hint: Determine how many years passed between lines 1 and 2 and between lines 3 and 4 to help you find your
answers,

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. 

Benjamin franklin and john adams

The process by weathered rock and mineral particles are removed from one area and transported elsewhere