the area of a rhombus is 36cm² and one of its diagonal is 18cm .its perimeter is :
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Hence the shorter diagonal is 36x2/18 = 4. Hence each side of the rhombus is sqrt of Sum of squares of half of diagonals = sqrt (9^2+2^2) = sqrt 85. Therefore the perimeter of the rhombus is 4 x sqrt 85.
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area of rhombus is 1/2 into d1 into d2
36 " 1/2 into 18 into d2
36" 9 into d 2
36/9 " d2
4 cm " d2
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