idklol57 idklol57

01-08-2018
Mathematics

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I really need to know the answer of this fast plss

I really need to know the answer of this fast plss class=

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mathecoach mathecoach

01-08-2018

a)

1/2·(6 + x)·4·4 = 88 --> x = 5 cm

(6 - x)^2 + 4^2 = 4.12^2 --> x = 5.013 cm

b)

4·1/2·(6 + 5)·4 + 2·(4 + 6 + 4.12)·4 = 201.0 cm²

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