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Question

In the follwing figure PQRS is a rhombus formed by joining the mid-points of a quadrilateral YMXN show that 3PQ2=SN2+NR2+QX2+XR2+PY2+YS2
395615_fa075076bd134e4cba08d6280e3d0b8e.png

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Solution

Given that, PQRS is a rhombus formed by joining mid-points of the sides of the quadrilateral YMXR
YMXR is a rectangle
Y=M=X=R=90
In triangle SNR,SN2+NR2=SR2
In triangle QXR,QX2+XR2=QR2
In triangle PYS,PY2+YS2=PS2
Since PQRS is a rhombus, PQ=RQ=RS=SP
SR2+QR2+PS2=3PQ2
3PQ2=SN2+NR2+QX2+XR2+PY2+YS2
1035608_395615_ans_1fca027ce76946689f8502a654ba1318.png

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