AB/DE = BC/EF = CA/FD
8/16 = 4/d = b/e
1/2 = = 4/d = b/e
so b = sqr (8^2-4^2) = 4 sqrt(3)
e = 2*4sqrt(3) = 8 sqrt(3)
Please let me know if you have any questions and best me if you are satisfactory.
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