The area of a rectangle is 84 cm square. One side is 12 cm. How much is each of its old ones?
| January 4, 2021 | education
Given:
The area S of the rectangle is 84 cm2.
One of the sides of the figure is 12 centimeters.
The length of one side a is already known from the problem statement – 12 centimeters.
To find the second side b, it is necessary to divide the area of the quadrangle by the known side a, that is, we calculate by the formula b = S: a:
b = S: a = 84: 12 = 7 centimeters.
Answer: the first side is 12 centimeters, the second side is 7 centimeters long.
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