The perimeter of the rectangle is 22 cm. The length of one side of it is 6 cm. The area of such a rectangle is?

1. Subtract the length of the known side from the semi-perimeter of the rectangle, and obtain the side adjacent to it:

Adjacent side = 22/2 – 6 = 11 – 6 = 5 cm.

2. Find the area of the rectangle by multiplying one adjacent side by the other:

Rectangle area = 6 cm * 5 cm = 11 cm2.

Answer: the area of the rectangle is 11 cm2.

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