If a square and a rhombus stand on the same base, prove that the square has the larger area.
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Solution
Let the side of the square be 'a'. Let the diagonals be ′2d1and′2d′2. Area of the square, A1=a2 Using pythagoras theorem, d21+d22=a2 Area of the rhombus, A2=12.2d1.2d2=2d1d2 (d1−d2)2=d21+d22−2d1d2 ⇒d21+d22=(d1−d2)2+2d1d2 ⇒ Area of square = Positive quantity + Area of Rhombus Area of Square > Area of Rhombus