# Math Help - Square and triangle.

1. ## Re: Square and triangle.

Originally Posted by bjhopper
... ADP is isosceles because each of its long sides is a radius but also DC, DP, and CP are radii so DPC is equilateral.
You cannot just say DC, DP and CP are radii of the 2 circles that you have drawn. Can you prove that point P intersects the 2 circles that you have drawn?