A circle has an area of 78.5m square what is its radius use pi as 3.14
well, a = pi r^2, so
r = √(a/pi)
Now just plug in your numbers
To find the radius of a circle given its area, you can use the formula:
Area of a circle = π * radius^2
In this case, the area of the circle is given as 78.5 m², and π is approximately 3.14. Let's substitute these values into the formula and solve for the radius:
78.5 = 3.14 * radius^2
First, divide both sides of the equation by 3.14:
78.5 / 3.14 = radius^2
24.968 = radius^2
Then, take the square root of both sides to find the radius:
√24.968 = √(radius^2)
The square root of 24.968 is approximately 4.998.
Therefore, the radius of the circle is approximately 4.998 meters.