Radius
Definition
The radius is defined as the distance from the center of a circle or sphere to any point on its circumference or surface respectively.
Analogy
Imagine you are standing at the center of a circular field and want to know how far it is to any point on its edge. The radius would be your answer - it's like measuring from where you stand to any spot along the boundary.
Related terms
Diameter: The diameter is twice the length of the radius and represents a straight line passing through the center of a circle or sphere and touching two points on its circumference or surface respectively.
Circumference: The circumference is equal to 2π times the radius and represents the total distance around a circle.
Sphere: A sphere is formed by rotating a circle about its diameter. It consists of all points equidistant from its center.
"Radius" appears in:
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