| A | B |
|---|
| circumference | distance around a circle |
| radius | segment from point on circle to center |
| concentric | 2 or more circles sharing the same center |
| arc | continuous part of a circle between 2 points on the circle |
| chord | segment through circle with endpoints on the circle |
| secant | line through circle |
| tangent | line touching one point on a circle |
| inscribed angle | angle with vertex on circle |
| central angle | angle with vertex at center of circle |
| quadrilateral | polygon with 4 sides |
| parallelogram | quadrilateral whose opposite sides are parallel |
| kite | quadrilateral with exactly two pairs of distinct congruent consecutive sides |
| congruent | same or equal |
| proportion | statement of equality between two ratios |
| pythagorean theorem | a squared + b squared = c squared |
