Respostas

2014-07-14T09:28:14-03:00
Varetas medem 85 cm e 50 cm. Forma losangular.

A=\dfrac{d.D}{2} \\  \\ A=\dfrac{50\cdot85}{2} \\  \\ A=\dfrac{4250}{2} \\  \\ \boxed{A=2.125 \ cm^2}
2014-07-14T10:05:14-03:00
A= D*d/2
A= 85 *50 /2
A = 2125 cm²