area= Pi x r-squared (25) divided by 3.14 = (3.14 x r-squared) divided by 3.14 (7.96) find the square root = (r-squared) find the square root 1.4 = radius
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When you try to figure out an area of a circle, you square the radius, then multiply it by pi to get the area of a circle. A radius square is radius x radius, or radius squared.
Radius = +sqrt(Area/pi)
In relation to the area of a circle: pi*radius^2
Relationship between radius and area of a circle is nonlinear. Area = pi * radius^2, so it is like a quadratic. If you graphed radius on the horizontal, and area on the vertical, it would be a parabola (actually a half of a parabola, since you cannot have a negative radius).
The area of a circle of radius r is pi*r*r