What is the perimeter of a rectangle, one side of which is equal to x centimeters and the other 20 m more, 3 cm less?
| July 18, 2021 | education
1) According to the condition of the problem, one side is equal to x cm, and the other is 2 cm larger, that is, x + 2.
The perimeter of a rectangle is twice the sum of its two sides:
P = 2 (x + x + 2) = 2 (2 x + 2) = 4 x + 4 (cm).
Answer: the perimeter of the rectangle is 4 x + 4 cm.
2) According to the condition of the problem, one side is equal to x cm, and the other is 3 cm less, that is, x – 3.
The perimeter of a rectangle is twice the sum of its two sides:
P = 2 (x + x – 3) = 2 (2 x – 3) = 4 x – 6 (cm).
Answer: the perimeter of the rectangle is 4 x – 6 cm.
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