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In a parallelogram a diagonal of the length 20 cm is perpendicular to one of the sides. Find the longer side of parallelogram if its perimeter is 80 cm.

User Don Subert
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1 Answer

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Hello,
Please, see the attached file.
Thanks.
In a parallelogram a diagonal of the length 20 cm is perpendicular to one of the sides-example-1
User John Stewart
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