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A rhombus with area 840 has a diagonal of length 40. What is its side length?

 Apr 11, 2019
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Area of rhombus =   d1 d2 / 2

    840 = 40 d2 /2

       d2 = 42                       1/2 of each of the diagonals form the legs of a right triangle with the side length as the hypotenuse

 

20^2 + 21^2 = s^2           s = 29

 Apr 11, 2019

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