An interior designer wants to install a circular stained-glass window on the triangular side wall of an attic bedroom. The window must touch all three sides of the triangular wall. Which point does he need to locate?
A. The point of intersection of the triangle's three perpendicular bisectors.
B. The point of intersection of the triangle's three angle bisectors.
C The point of intersection of one of the triangle's perpendicular bisectors and one of
its angle bisectors.