Rhombus

Calculate the length of the diagonal AC of the rhombus ABCD, if its perimeter is 84 dm and the other diagonal BD has length 20 dm.

Correct result:

u =  36.93 dm

Solution:

a=84/4=21 dm (u/2)2=a2(20/2)2 u=4a2202=36.93 dm



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