A circle has an area of 78.5 m square what is its radius use pie =3.14
A circle has an area of 78.5m2.what is its radius
A = πr^2
Insert values and solve for r.
JFB
To find the radius of a circle when given its area, you can use the formula for the area of a circle:
Area = π * r^2
Given that the area of the circle is 78.5 square meters and π is approximately equal to 3.14, we can substitute these values into the formula and solve for the radius (r):
78.5 = 3.14 * r^2
To isolate r^2, we divide both sides of the equation by 3.14:
r^2 = 78.5 / 3.14
Simplifying the right side of the equation:
r^2 = 25
To solve for r, we take the square root of both sides of the equation:
√r^2 = √25
r = 5
Therefore, the radius of the circle is 5 meters.