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# geometry

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The adjacent sides of a parallelogram are 30 and 20. The length of one of the diagonal is 40. What is the length of the other diagonal?

Aug 4, 2020

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so we square the diagonal to get 1600 then we subtract 2(30^2-20^2) to get 600 then add 20^2 to get 1000 then we square root it to get $$\boxed{\sqrt{1000}}$$

Aug 4, 2020
edited by jimkey17  Aug 4, 2020
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Edited reason: wrong spelling :(

Aug 4, 2020