The perimeter of a square ABCD is twice the perimeter of ∆PQR. Find the area of the square
ABCD.
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Perimeter of ∆PQR = 6 cm + 5 cm + 7 cm = 18 cm
Perimeter of square = 2 × 18 = 36 cm
Side of square = ?
4 × side = 36
⇒ Side = 364 = 9
Area of square = (side)2 = (9)2 = 9 × 9 = 81 cm2.
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