A circle is a simple shape of Euclidean Geometry consisting of those points in a plane which are equidistant from a given point called the center. The common distance of the points of a circle from its center is called its radius.
Listed below are some of the circle properties.
Center: A point inside the circle. All points on the circle are equidistant (same distance) from the center point.
Radius: The radius is the distance from the center to any point on the circle. It is half the diameter.
Diameter: The distance across the circle. The length of any chord passing through the center. It is twice the radius.
Area: Strictly speaking a circle is a line, and so has no area. What is usually meant is the area of the region enclosed by the circle.
Chord: A line segment linking any two points on a circle.
Tangent: A line passing a circle and touching it at just one point is known as the tangent circles.
Secant: A line that intersects a circle at two points.
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