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circle vocabulary
terms and definition
| 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. |
| Circle | the set of all point 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 | Circle 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 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 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. |