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Circle of vocabulary

definition of terms

QuestionAnswer
Chord A segment whose endpoints lie on a circle.
Diameter A cord that contains the center of a circle
Secant of a Circle A line that contains a chord
Tangent to a Circle A line that contains a chord
Circle The set of all points in a plane at a given distance from a given point in the plane
Radius A segment from a point on a circle or a sphere to the center.
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 circle and whose sides contain chords of the circle.
Central Angle Angle whose vertex is the center of the circle and whose sides contain radii of the 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 of a diameter.
Minor Arc An arc of a circle whose length is less than the length of a semicircle of the circle.
Major act An arc of a circle whose length is greater than the length of a semicircle of the circle
Created by: Gilbert174
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