The perimeter of a rectangle is 54 cm. if the length of the rectangle is 18 cm ,find the area

162 cm

Explanation:

Alright so the formula for perimeter is 2L + 2W = P

The length is 18, and the perimeter is 54, so the equation becomes 2(18) + 2W = 54.

This simplifies to 36 + 2W = 54.

So begin isolating the W, you subtract 36 from both sides:

2W = 18

Then you get W by itself by dividing both sides by 2:

W = 9

Now that you know your width is 9, you multiply it by the length, 18, to get the area.

9 x 18 = 162

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