| A | B |
|---|
| Perpendicular lines | Angles that are formes by two intersecting lines and are equal to 90 degrees. |
| Parllel lines | Lines in the same plane the do interesect at all. |
| Skew lines | Lines do not intersect , and yet they are also not parllel. |
| Vertical Angles | Opposite angles formed by two intersecting lines. |
| Transversals | Lines that intersect with two or more lines. |
| Circle | the set of all points in a plane |
| Radius | Line segments whose endpoints are the center of a circle any any point on the circle. |
| Arc | Part of a circle named by its endpoints. |
| Diameter | Line segment that passes through the center of a circle. |
| Chord | Line segment whose endpoint are any two point on a circle. |
| Central Angle of a circle | An angle formed by two radii. |
| Sector of a circle | The part of tje circle enclosed by two radii and an arc connecting them. |
