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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 a chord
tangent to a circle a line that lies in the in the plane of a circle and that intersects the circle at exactly one point
circle the set of all points in a plane at a given point in the plane
radius a segment from a point on a circle or a sphere to center
congruent circle 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 a 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 circumfernce of a circle defined by the arc
arc of a circle two points on a circle and the continous part of the circle between the two points
semicircle an arc of circle whose endpoints are the endpoints of a diameter
minnor arc an arc of the circle whose lenght is less than the lenght of a semicircle of the circle
major arc an arc of a circle whose length is greater than the length semicircle of the circle
Created by: casper1619