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In triangle ABC, AC = BC and angle C = 90. Points P and Q are on AB such that QCP = 45. Rotate the diagram counter-clockwise around C by 90 degrees. Let P go to point P'. Prove that angle P'CQ is equal to 45 degrees. 

 

 Feb 28, 2021
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Part of an aops problem... use the msg board... week 19 right?

 Feb 28, 2021

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