How is the economy of northern europe different from that of the united states?

This may not be your answer nor helpful, but Europe has more reliable Market Economy because its not all profit, they don't sell Cheap or low quality goods to the community Example We have a Microwave from Europe that my family Bought in 1997, now normally American Microwaves last only when the warranty expires or less.  Our microwave is still running after 21 years. Now thats worth your money.  (Forgot to add but living in Europe is better than America, tho don't take that as advice.)  

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.