click below
click below
Normal Size Small Size show me how
circle vocab
definition of terms
Term | Definition |
---|---|
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 |
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 a circle and whose sides contain radii of the circle |
circumference | distance around a circle, that is, the perimeter of a circle |
arc lenght | 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 lenght is less than the lenght of a semicircle of the circle |
major arc | an arc of a circle whose lenght is greater than the lenght of a semicircle of the circle |