| A | B |
|---|
| Acute Triangle | A triangle with all angles less than 90° |
| Obtuse Triangle | A triangle with one angle greater than 90° and less than 180° |
| Right Triangle | A triangle with one angle equal to 90° |
| Scalene Triangle | A triangle with no sides of equal length |
| Isosceles Triangle | A triangle with at least two sides of equal length |
| Equilateral Triangle | A triangle with three sides of equal length |
| 180° | The sum of all the angles in any triangle |
| 90° | The angle measurement of a right angle |
| less than 90° | The angle measurement of an acute angle |
| Between 90° and 180° | The angle measurement of an obtuse angle |
