| A | B |
|---|
| equilateral | triangle with three equal sides |
| isosceles | triangle with two equal sides |
| scalene | triangle with no equal sides |
| right | triangle with one right angle |
| acute | triangle with all acute angles |
| obtuse | triangle with one obtuse angle |
| parallel | two lines equidistant apart |
| perpendicular | two lines that meet at a 90 degree angle |
| interior | inside two parallel lines |
| exterior | ourside two parallel lines |
