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  1. Radius of a Circle - Formula | What is Radius? | Radius Formula

    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 …

  2. RADIUS Definition & Meaning - Merriam-Webster

    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.

  3. Radius of a Circle Calculator

    You don't have to choose which radius of a circle formula you need: simply input the measurement into the tool, and it will automatically process the radius of a circle equation …

  4. Radius of a Circle – Definition, Formulas, Examples

    Aug 3, 2023 · The radius of a circle is the distance from the center of the circle to any point on its circumference. It is half the length of the diameter of the circle. Shown below is the radius of …

  5. Radius of a circle definition and calculator - Math Open Reference

    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 …

  6. RADIUS | definition in the Cambridge English Dictionary

    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).

  7. Radius of a Circle - Definition, Formula, Facts, Examples,

    The radius of the circle is the distance between the center of the circle and any point on its circumference. Learn the definition, formulas, examples, and more.

  8. Radius, diameter, & circumference - Khan Academy

    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 …

  9. Radius - Math.net

    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.

  10. How to Calculate the Radius of a Circle: Formulas & More - wikiHow

    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.