| A | B |
|---|
| inscribed polygon | all vertices of polygon lie on circle |
| circumscribed polygon | circle is inscribed within a polygon |
| tangent line | outside of circle, touches circle at one point |
| arc | a "piece" of the circle itself |
| central angle | vertex is at center point |
| perpendicular diameter... | to a chord, bisects the chord and its arc |
| chord | connects any two points on a circle |
| equidistant | congruent distances |
| congruent chords | equidistant from center point |
| inscribed angle | vertex is on circle |
| equals half the measure of the arc | an inscribed angle |
