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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 = 6 cm and AD = 8 cm, what is the area of quadrilateral DQRC in cm^2?

 

 May 23, 2021
 #1
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The area of quadrilateral DQRC is 15.

 May 23, 2021
 #2
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[CDRQ] = 62 - 1/2{sqrt[1/2(8 - 4)2]}2 = 14 cm2 laugh

 May 24, 2021
 #3
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Oopscheeky

[CDRQ] = 1/2(62) - 1/2{sqrt[1/2(8 - 4)2]}2 = 14 cm2

Guest May 24, 2021

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