Final answer:
To find the radius of a circle when given its area, use the formula r = √(A/π), where A is the area of the circle.
Step-by-step explanation:
To find the radius of a circle when given its area, you need to use the formula A = πr², where A is the area and r is the radius. To isolate r, you can rearrange the formula to r = √(A/π). So, if you know the area of a circle, you can find its radius by taking the square root of the area divided by π.