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Question

Find PB, given that PA=15,PC=20,PD=7, and ABCD is a square.
1214136_b16e900757ab4b89bb8100e87bfb0cba.PNG

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Solution


(1)PA2=x2+(hy)2=152(2)PC2=(hx)+y2=400(3)PD2=x2+y2=49x2+(hy)2+(hx)2+y2x2y2=225+40049(hy)2+(hx)2=576PB2=576PB=24

Hence, this is the answer.

1219692_1214136_ans_01cd4b2c83dc4df6a2070ca9f81803aa.PNG

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