Let A B C be a right triangle with right angle at B. Let A C D E be a square drawn exterior to triangle A B C. If M is the center of this square, find the measure of \angle M B C.
Let A B C be a right triangle with right angle at B. Let A C D E be a square drawn exterior to triangle A B C. If M is the center of this square, find the measure of \angle M B C.