A plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast with some length is Rectangle Bar.
Length (L) = 10 m , Side A = 2
Side B = 1 m , Area (A) = ?
Area (A) = 2 * ((2*1)+(2*10)+(1*10))
Area (A) = 2 * (2+20+10)
Area (A) = 64 m2