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2014-09-03T15:30:16-03:00
A= D.d/2 A= 37.5 . 24.2 /2 A= 907.5 /2 A=453.75 cm2
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2014-09-03T16:09:02-03:00
A = (D . d)/2
A =  ( 37,5 . 24,2)/2
A = (907,5)/2
A= 453,75cm²
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