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36cm
42cm
ok if the perimeter is 36cm and it is a square then you know all four sides are equal 36cm / 4sides = 9cm for each side A = L * W ( both the length and width are 9cm because each side is equal ) A = 9cm * 9cm A = 81cm2
The surface area of a sphere with a radius of 42cm is about 22,167cm2
The rectangle has dimensions of [ 12 x 3 ].