One side of the rectangle is 70 cm, and the area is 210 cm2. find the perimeter of the rectangle
| January 9, 2021 | education
A rectangle is a rectangle with equal opposite sides and right angles.
Its area is determined by the formula:
S = a * b, provided that it leaves 210 cm², and one side is 70 cm, we find the unknown:
b = S: a = 210: 70 = 3 cm.
The perimeter of such a figure is calculated by the formula:
P = 2a + 2b = 2 * 70 + 2 * 3 = 140 + 6 = 146 cm.
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