The plural form is radii (pronounced "ray-dee-eye"). In the figure above, drag the orange dot around and see that the radius is always constant at any point on the circle. Sometimes the …

The meaning of RADIUS is a line segment extending from the center of a circle or sphere to the circumference or bounding surface. How to use radius in a sentence.

The radius of a circle is defined as a line segment that joins the center to the boundary of a circle. The length of the radius remains the same from the center to any point on the circumference …

The supermarket, shopping mall, and school are all within a one-mile radius of the house (= are all less than a mile away from it).

Oct 7, 2025 · The radius of a circle is the distance from the center of the circle to any point on its circumference. The easiest way to find the radius is by dividing the diameter in half.

The radius (plural radii) of a circle is any line segment that has one endpoint on the center of the circle and the other endpoint on the circle's circumference.

Learn the relationship between the radius, diameter, and circumference of a circle. What is a circle? We've all seen circles before. They have this perfectly round shape, which makes them …

Jul 23, 2025 · The radius of a circle is the distance from the center of the circle to any point on its circumference. It is a constant length for a given circle and is half the diameter of the circle.

Our radius of a circle calculator lets you instantly compute the radius from diameter, circumference, or area. Simply select the input type, enter your known measurement, and get …

RADIUS meaning: 1 : a straight line from the center of a circle or sphere to any point on the outer edge; 2 : the length of this line