| A | B |
|---|
| two rays with the same endpoint | angle |
| a location on a line, in a plane, or in space | point |
| part of a line with 2 endpoints | line segment |
| a straight path of points extending in both directions with no end points | line |
| a part of line that begins with an endpoint and extends forever in the opposite direction | ray |
| an angle with a measure less than a right angle | acute angle |
| lines that intersect to form 4 right angles | perpendicular lines |
| lines that cross each other | intersecting lines |
| an angle that forms a square corner | right angle |
| lines that never intersect | parallel |
| an angle with a measure greater than a right angle | obtuse angle |
