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 …

A circle is easy to make: Draw a curve that is radius away from a central point. And so: All points are the same distance from the center.

CBS News, 29 Dec. 2025 Players stand in a circle and keep a ball in the air for as long as possible using their feet, knees, chins, hips, heads and even their butts — anything but their …

circle noun (SHAPE) Add to word list A2 a round, flat shape like the letter O, or a group of people or things arranged in this shape

Define circle. circle synonyms, circle pronunciation, circle translation, English dictionary definition of circle. circle n. 1. a. A plane curve everywhere equidistant from a given fixed point, the …

You can also use the formula C = πd, where d is the diameter of the circle. π is a mathematical constant that represents the ratio of the circle's circumference to its diameter.

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 …

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.

It might seem pretty simple to identify a circle, but there are a few key features a shape must have in order to be a circle. Essentially, circles around round shapes without any corners or edges.

Dec 3, 2025 · A circle is the set of points in a plane that are equidistant from a given point O. The distance r from the center is called the radius, and the point O is called the center.