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Circle Vocabulary Games

AB
CircleThe set of all points equidistant from a given point
interior pointA point inside the circle
exterior pointA point outside the circle
ChordA line segment whose endpoints lie on the circle
DiameterA chord that passes through the center of a circle
RadiusA line segment that has one endpoint at the center of the circle and the other endpoint on the circle
TangentA line that intersects a circle in one and only one point
Point of tangencyThe point where a line touches a circle at one point only
SecantA line that intersects the circle in two points
Common internal tangentA line that is tangent to two circles and crosses a line segement that connect the centers of the two circles
Common tangentA line that is tangent to two circles that are also tangent to each other
Common external tangentA line that is tangent to two circles but does not intersect a line segment that connects the centers of the two circles
Concentric circlesCircles with the same center
Central angleAn angle whose vertex lies at the center of the circle
ArcAn unbroken part of a circle
Minor ArcAn arc whose measure is greater than zero degrees but less that 180 degrees
Major arcAn arc whose measure is greater than 180 degrees but less than 360 degrees
SemicircleAn arc whose measure is exactly 180 degrees
Inscribed angleAn angle whose vertex lies on the circle
SectorAn area of a circle created by two radii
Intercepted ArcAn arc lies on the circle within the two sides of an angle.

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