| A | B |
|---|
| Acute angle | Angle less than 90 degrees |
| Right angle | Angle that has exactly 90 degrees |
| Obtuse angle | Angle that has more than 90 degrees |
| Straight angle | angle tha t has 180 degrees |
| Equilatera l triangle | Has three equal sides |
| Isosceles triangle | Has two sides that are the sme length |
| Scalene triange | Has no two sides the same. |
| Obtuse triangle | Has an angle with more than 90 degrees |
| Perpendicular lines | Lines that meet at 90 degrees |
| Ray | Set of points that has one end point |
