| A | B |
|---|
| circle | set of all points equidistant from a single point |
| diameter | segment passing through the center and has endpoints on the circle |
| radius | segment from the center to the outside of a circle |
| concentric circles | circles that share the same center |
| congruent circles | circles with the same radius |
| arc | two points on the circle and the curve in between them |
| semicircle | arc whose endpoints are the endpoints of the diameter |
| major arc | arc that's bigger than a semicircle |
| minor arc | an arc smaller than a semicircle |
| central angle | angle with vertex at the center of the circle |
| chord | segment with both endpoints on the circle |
| tangent | segment that touches the circle at only one point |
| trapezoid | quadrilateral with one pair of congruent sides |
| kite | quadrilateral with two pair of consecutive congruent sides |
| parallelogram | quadrilateral with two pair of parallel sides |
| rhombus | equilateral quadrilateral |
| square | regular quadrilateral |
| isosceles trapezoid | quadrilateral with two parallel sides and congruent legs |
| isosceles triangle | triangle with two congruent sides |
| rectangle | equiangular quadrilateral |
