Missing Lengths

Can you figure out the value of the letters used to represent the missing lengths? You can earn a trophy if you get at least 10 correct.

a = Correct Wrong b = Correct Wrong c = Correct Wrong d = Correct Wrong
e = Correct Wrong f = Correct Wrong g = Correct Wrong h = Correct Wrong
i = Correct Wrong j = Correct Wrong k = Correct Wrong l = Correct Wrong

 

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