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Two sides of a parallelogram are 30 and 20. One diagonal has a length of \(40\). What is the length of the other diagonal?

 Jan 12, 2022
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paralellogram rule

2 (30)2 + 2(20)2  = 402 + d2

d = sqrt 1000 = 10 sqrt (10)

 Jan 12, 2022

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