Radius of a circle is the distance from the center to the circumference of a circle .
From the formula to calculate the area of a circle;
![How to Calculate Radius of a Circle from Area.](https://www.learntocalculate.com/wp-content/uploads/2020/04/Area-of-a-circle.png)
Where, r is the radius of the circle
and π is a constant estimated to be 3.142.
We get;
![How to Calculate Radius of a Circle from Area.](https://www.learntocalculate.com/wp-content/uploads/2020/04/Area-of-a-circle-2.png)
Example:
Calculate the radius of a circle whose area is 154 cm² .
![How to Calculate Radius of a Circle from Area.](https://www.learntocalculate.com/wp-content/uploads/2020/04/Area-of-a-circle-3.png)
Therefore, the radius of the circle is 7cm.