The circumference of a circle is 20π cm. What is the area, in square centimeters?
To find the area of a circle, we use the formula A = πr^2, where r is the radius of the circle.
Since the circumference of the circle is 20π cm, we can find the radius by dividing the circumference by 2π:
Radius = Circumference / (2π) = 20π / (2π) = 10 cm
Now we can calculate the area:
Area = π * (10)^2 = 100π cm^2
Therefore, the area of the circle is 100π square centimeters.
The circumference of a circle is 25π in. What is the area, in square inches
To find the area of a circle, we use the formula A = πr^2, where r is the radius of the circle.
Since the circumference of the circle is 25π in, we can find the radius by dividing the circumference by 2π:
Radius = Circumference / (2π) = 25π / (2π) = 12.5 in
Now we can calculate the area:
Area = π * (12.5)^2 = π * 156.25 = 156.25π in^2
Therefore, the area of the circle is 156.25π square inches.
The circumference of a circle is 19π m. What is the area, in square meters
To find the area of a circle, we use the formula A = πr^2, where r is the radius of the circle.
Given that the circumference of the circle is 19π m, we can find the radius by dividing the circumference by 2π:
Radius = Circumference / (2π) = 19π / (2π) = 9.5 m
Now we can calculate the area:
Area = π * (9.5)^2 = π * 90.25 = 90.25π m^2
Therefore, the area of the circle is 90.25π square meters.