| A | B |
|---|
| right angle | A 90 degree angle |
| equilateral triangle | A triangle with all sides and angles equal. |
| scalene triangle | A triangle having three unequal sides and angles. |
| vertex | The intersection point of two sides. |
| right triangle | A triangle with one angle equal to 90 degrees. |
| acute angle | An angle less than 90 degrees. |
| obtuse angle | An angle greater than 90 degrees. |
| isosceles triangle | A triangle with two sides of equal length. |
| acute triangle | A triangle with all angles less than 90 degrees. |
| obtuse triangle | A triangle with one angle greater than 90 degrees. |
