| A | B |
|---|
| triangle | Three segments connecting three non-collinear points. |
| right triangle | A triangle containing one 90 degree angle. |
| obtuse triangle | A triangle containing one angle greater than 90 degrees |
| acute triangle | A triangle containing three angles less than 90 degrees. |
| scalene triangle | A triangle containing three sides of different lengths. |
| isosceles triangle | A triangle containing at least two congruent sides. |
| equilateral triangle | A triangle with all sides congruent. |
| equiangular triangle | A triangle with all angles measuring 60 degrees. |
| vertex | The point where 2 sides meet. |
| median | A segment connecting a vertex with the midpoint of the opposite side. |
| altitude | A segment from the vertex perpendicular to a point of the line containing the opposite side. |
| angle bisector | A segment that divides an angle into 2 congruent angles. |
| hypotenuse | The side opposite the right angle in a right triangle. |
| legs | The sides that form the right angle in a right triangle or the sides that are congruent in an isosceles triangle. |
| side | The segment connecting two vertices of a triangle |
