document.write( "Question 1153572: In right triangle ABC, AC = BC and ∠C = 90. Let P and Q be points on hypotenuse \n" );
document.write( "AB, such that ∠PCQ = 45°. Show that AP^2+BQ^2=PQ^2. I think the first step is \n" );
document.write( "to rotate it 90 degrees counter clockwise around C, let P go to P’ and find ∠P’CQ. \n" );
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