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# circle

### vocabulary

TermDefinition
Chord A segment whose endpoints lie on a circle.
Diameter A chord that contains the center of a circle.
Secant of a circle A line that contains a chord.
Tangent to a circle A line that lies in the plane of a circle and that intersects the circle at exactly one point (point of tangency )
Circle The set of all points in a plane at a given distance from a given point in the plane.
Congruent Circles Circles with the same radius.
Congruent Circles Circles with the same radius.
Concentric Circles Circles that lie in the same plane that share the same center.
Inscribed Angle Angle whose vertex lies on a circles and whose sides contain chords of the circle.
Central Angel Angel whose vertex is the center of a circle and whose side contain radii of a circle.
Circumference Distance around a circle, that is, the perimeter of a circle.
Arc length A fraction of the circumference of a circle defined by the arc.
Arc of a circle Two points on a circle and the continuous part of the circle between the two points.
Semicircle An arc of a circle whose endpoints are the endpoints of a diameter.
Minor Arc An arc of a circle whose length is a less than the length of a semicircle of the circle.
Major Arc An arc of a circle whose length is greater than the length of a semicircle of the circle
Created by: diana_0097

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