Sunday, May 24, 2015

472: How Many geometry Theorems Are There?

That's pretty much it: How many Geometry Theorems are needed to solve this extended problem?


1 comment:

  1. The congruence of the triangles is trivial, then one of them turned 90 degrees relative to the other one, which means that GFE is a right angle. So the point F sits on the half circle for which GE is a diameter, the same is true for the point A. Then the radius of the circumcircle is half of the diameter 1/2(SQRT(9^2 + 6^2)). The whole problem is not exactly trivial, but pretty close to it.