math

Set of all points in a plane where each points is equal distance from a fixed

Circle

A line segment where one endpoint is at the center of the circle and the other endpoint is a point on the circle

Radius

A line segment whose endpoints are on the circle

Chord

A part, section, or portion of a circle

Arc

The end points are on the circle and its passes through the circle

Diameter

May be, a line, or a line segment that intersects the circle at two points

Secant

May be a line, a ray or line segment, which is on the same plane of the circle intersecting the circle at only one point

Tangent

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Line

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Segment

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Ray

An angle formed by two radii and whose vertex is the center of the circle

Central angle

An arc whose endpoints are also endpoints of the diameter of a circle

Semi-circle