A 35-inch by 35-inch piece of marble that is 54 inches long is cut lengthwise along its diagonal. Find the perimeter and area of the cross section formed by the cut.

Answer 1

square of length 35,

perimeter P = 4s = 4*35 = 140 u (u is arbitrary unit length, eg meters)

area A = bh/2 (one half base times height!)

A = (35*35) / 2 = 612.5 u**2 (squared arbitrary length units, eg meters**2)