If its sides are 3 by 4 then using Pythagoras its diagonal is 5 feet
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The question cannot be answered because it is not clear what the THREE measures refer to. A rectangle is usually defined by only two lengths.
A square yard is 3ft by 3ft
Surface area = 2*(3*4 + 4*5 + 5*3) = 2*(12 + 20 + 15) = 2*47 = 94 sq ft.
60 inches is bigger. 60in = 5ft 48in=4ft
Two and Four are both common denominators of Four and Eight, therefore either of these can be used. You would need only two 4ft square tiles or eight 2ft square tiles to cover the 4ft x 8ft floor.
a 6ft by 5ft rectangle is a 6 feet by 5 feet rectangle.