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A rectangular piece of paper ABCD is folded so that edge CD lies along edge AD, making a crease DP. It is unfolded, and then folded again so that edge AB lies along edge AD, making a second crease AQ. The two creases meet at R, forming triangles PQR and ADR. If AB=5 cm and AD=8 cm, what is the area of quadrilateral DRQC, in cm2?

 

 May 2, 2021
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You should search the problem up on google, this is a competition problem for the cemc Waterloo contest and has also had several solutions on this same website in the past.

 May 2, 2021

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