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Question

Find the side if a square whose area is equal to the area of a triangle whose vertices are A(3,2),B(11,8) and C(8,12).

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Solution

ΔABC=12∣ ∣32111818121∣ ∣

R2R2R1,R3R3R1

ΔABC=12∣ ∣3218605100∣ ∣=1286510=25

Hence side of the square is =25=5

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