The width of the rectangle is 9mm and it is 1cm less than the length. Find the perimeter and area of the rectangle.
December 30, 2020
The width of the rectangle = 9mm by convention. It is 1 cm less than the length. So length = 1cm 9mm or 19mm.
P = 2a + 2b = 2 * 9 + 2 * 19 = 18 + 38 = 56mm.
S = a * b = 9 * 19 = 171mm.
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