The area of circle is 78.5 cm square. Calculate the circumference of the circle
To calculate the circumference of a circle, you need to know its radius or diameter. Since the area of the circle is given, we can find the radius using the following formula:
Area = π * r^2
Given that the area is 78.5 cm^2, we can rearrange the formula to solve for the radius:
r^2 = Area / π
r^2 = 78.5 / 3.14159
r^2 ≈ 24.985
Taking the square root of both sides, we find:
r ≈ √24.985
r ≈ 4.999
Now that we have the radius, we can calculate the circumference using the formula:
Circumference = 2 * π * r
Plugging in the value of the radius we found:
Circumference ≈ 2 * 3.14159 * 4.999
Circumference ≈ 31.4159 cm
Therefore, the circumference of the circle is approximately 31.4159 cm.
ur mom
area of a circle is pirsquared
pi will be equated to 3.14
so 3.14xr^2=78.5
to get r^2=78.5 divided by 3.14
to get r u will get the square root of the answer u got and to get the diameter u multiply the radius by two
circumference is equals to pi x d
which is 3.14 x diameter
πr^2 = 78.5, so r=√(78.5/π)
C = 2πr = 2π√(78.5/π) = √(314π) ≈ 10√π3