Find the area of a circle if its diameter is 3 cm.
| April 26, 2021 | education
From the condition, we know the diameter of the given circle and it is equal to 3 cm. And the value of the constant of the number π = 3.14 is also known.
In order to find the area of a circle, recall the formula for finding it through the diameter of the circle.
S = 1 / 4πD ^ 2, where D is the diameter of the circle.
We just have to substitute the known values and perform the steps to find the area of the circle.
S = 1/4 * 3.14 * 3 ^ 2 = 1/4 * 3.14 * 9 = 28.26 * 1/4 = 7.065 cm2.
Let’s round the found value of the area of the circle to an integer and get 7 cm2.
Answer: 7 cm2.
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