Here's the question you clicked on:
iluvvyyhu
Look at the figure. Under what conditions will the triangle formed by the three squares be a right triangle?
Sounds a bit like pythagoras' theorem
One sec let me get the image because thats what i thought at first
Area of Square 2 is equal to the perimeter of Square 3. Area of Square 3 is equal to the perimeter of Square 1. Difference of the area of Square 2 and Square 3 is equal to the area of Square 1. Difference of the area of Square 1 and Square 2 is equal to the area of Square 3. :/
here is a website that gives a interactive representation of what you need. http://www.pbs.org/wgbh/nova/proof/puzzle/theorem.html