It is also a transcendental number, meaning that it is not the root of any non-zero polynomial that has rational coefficients. π is an irrational number meaning that it cannot be expressed exactly as a fraction (though it is often approximated as ) and its decimal representation never ends or has a permanent repeating pattern. The radius, diameter, and circumference of a circle are all related through the mathematical constant π, or pi, which is the ratio of a circle's circumference to its diameter.
The figures below depict the various parts of a circle: Minor sector – a sector with a central angle less than 180°.Major sector – a sector with a central angle larger than 180°.
Sector: the area of a circle created between two radii. Tangent: a line that intersects the circle at only a single point the rest of the line, except the single point at which it intersects the circle, lies outside of the circle. Secant: a line that passes through the circle at two points it is an extension of a chord that begins and ends outside of the circle. A chord that passes through the center of the circle is a diameter of the circle. Chord: a line segment from one point of a circle to another point. Minor arc: an arc that is less than half the circumference. Major arc: an arc that is greater than half the circumference. Arc: part of the circumference of a circle. Circumference: the distance around the circle, or the length of a circuit along the circle. It is equal to twice the length of the radius. Diameter: the largest distance between any two points on a circle by this definition, the diameter of the circle will always pass through the center of the circle. It is equal to half the length of the diameter. Radius: the distance between any point on the circle and the center of the circle. Center (or origin): the point within a circle that is equidistant from all other points on the circle. It can also be defined as a curve traced by a point where the distance from a given point remains constant as the point moves. More specifically, it is a set of all points in a plane that are equidistant from a given point, called the center. Radius (R)Ī circle, geometrically, is a simple closed shape. Please provide any value below to calculate the remaining values of a circle. Home / math / circle calculator Circle Calculator
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