The surface area of the ball = 20п cm. Find the area of the great circle of the given ball.
| February 18, 2021 | education
The surface area of a ball is described by the following formula:
S = 4πR ^ 2.
By condition, 4πR ^ 2 = 20n. Let us express from this R ^ 2:
R ^ 2 = 20π / 4π.
R ^ 2 = 5.
The radius of the large circle will match the radius of the given ball. The area of a circle is calculated by the formula nR ^ 2.
Then we get that the area of this circle: 5p.
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