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  1. Circle - Wikipedia

    Natural circles are common, such as the full moon or a slice of round fruit. The circle is the basis for the wheel, which, with related inventions such as gears, makes much of modern machinery …

  2. Circle - Parental Control & Internet Filtering Device and App

    Circle is the easiest parental control device and app to manage screen time across all your family’s connected devices. Keep kids safe online: block inappropriate content and set online …

  3. Circles - Formulas, Properties | What is a Circle? | Examples

    A circle is a 2-dimensional closed shape that has a curved side whose ends meet to form a round shape. Learn about circles with concepts, properties, and examples.

  4. Circle - Math is Fun

    There are two main slices of a circle. The Quadrant is a special sector with a right angle. It has a quarter of the circle's area. Half a circle is called a Semicircle. A circle has an inside and an …

  5. What is a Circle? Definition, Formulas, Properties, Examples

    A circle is a two-dimensional closed figure that has no edges or corners. Learn the definition of circle, different parts of circle, solved examples and more.

  6. Circle Calculator

    Aug 1, 2025 · Use this circle calculator to find the area, circumference, radius or diameter of a circle. Given any one variable A, C, r or d of a circle you can calculate the other three unknowns.

  7. Circle – Definition, Parts, Properties, Formulas - Math Monks

    Aug 3, 2023 · What is a circle with diagram - find out its definition, parts, and properties along with calculation of radius, diameter, area, and circumference using formulas

  8. Circle | Circle Geometry, Radius & Diameter | Britannica

    Nov 14, 2025 · Circle, geometrical curve, one of the conic sections, consisting of the set of all points the same distance (the radius) from a given point (the centre). A line connecting any …

  9. Circles | Brilliant Math & Science Wiki

    2 days ago · A circle is a round plane figure with a boundary (called the circumference) that is equidistant from its center. It is a fundamental object studied in geometry.

  10. CIRCLE Definition & Meaning - Merriam-Webster

    The meaning of CIRCLE is ring, halo. How to use circle in a sentence.