The perimeter of the rectangle is 36 cm. Can this rectangle be 20 cm long?
| February 23, 2021 | education
The perimeter of a rectangle is the sum of its length and width times two. Let the width of the rectangle be a. Let’s write the expression for the perimeter of this rectangle:
p = 2 (20 + a) = 40 + 2a.
Since a is positive, the inequality for comparing the perimeter of the rectangle and 36 cm will look like:
40 + 2a> 36
Answer: such a rectangle cannot be 20 cm long.
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