The perimeter of the rectangle is 48 cm and the length is 3 cm, calculate the area of the rectangle.
| September 5, 2021 | education
1. Find the width of the rectangle by the formula a = P / 2 – b, where P is the perimeter of the rectangle, a is its width, b is the length:
a = 48/2 – 3 = 24 – 3 = 21 cm.
2. Find the product of the length and width of the rectangle, get its area:
21 cm * 3 cm = 63 cm2.
Answer: the area of the rectangle is 63 cm2.
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