Question

a point is on a circle if the distance from the center of the circle to the point is equal to the
area.
circumference.
radius.
diameter.

Explanation:

By the definition of a circle, a circle is the set of all points in a plane that are at a given distance (the radius) from a given point (the center). The area of a circle is calculated by \(A = \pi r^{2}\), the circumference is \(C=2\pi r\), and the diameter \(d = 2r\). The key property for a point being on the circle is the distance from the center to the point (radius).

Answer:

radius.