Find the area of a circle with a radius of 7 dm.
| September 11, 2021 | education
Find the area of a circle whose radius is 7 dm. Let’s round the number to tenths.
In order to find the area of a circle, we use the formula for the area of a circle.
S = pi * R².
It is known that pi = 3.14, then, substituting the known values into the formula, we calculate the area of the circle.
S = pi * R ^ 2 = 3.14 * (7 dm) ^ 2 = 3.14 * 49 dm ^ 2 = 153.86 dm ^ 2 = 153.9 dm ^ 2;
Answer: S = 153.9 dm ^ 2.
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