How to find the radius of a circle when only the area is known?

Divide the area by pi. Then, square root the answer.

Step-by-step explanation:

Area of a cirlce= pi r^2

You have to divide by pi (3.14) APROXIMATELY and then divide what you get by the square root.

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

hi! i think the answer is 1/2 : )