| A | B |
|---|
| a triangle with three equal sides | equilateral triangle |
| a triangle with three equal angles | equiangular triangle |
| a triangle with at least 2 equal sides | isosceles triangle |
| a triangle with three angles between 0 and 90 | acute triangle |
| a triangle with 1 angle between 90 and 180 | obtuse triangle |
| a triangle with 1 right angle | right triangle |
| a triangle with no equal sides | a scalene triangle |
| a triangle with 3 obtuse angles | does not exist |
| a triangle with at least 1 right angle | does not exist |
| a triangle with three 60 degree angles and 3 different side lengths | does not exist |
