An American Mathematical Monthly Problem
Given triangle ABC, squares are constructed on each side, and parallelograms
connected to the squares as shown below.
The problem is to show that the resulting triangle AKJ is an isosceles
right triangle for any original triangle.
A,B,C may be dragged in the
drawing for numerical validation of the assertion.
The problem can be found in American Mathematical Monthly, Vol 75 p
899 problem E2124.
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