| A | B |
|---|
| acute triangle | A triangle with three acute angles. |
| base angles of an isosceles triangle | The two angles at thea base of an isosceles triangle. |
| base of an isosceles triangle | The side opposite the vertex angle. |
| centroid | The point at which the three medians of a triangle intersect, |
| corollary | A theorem that is easily proven from another theorem. |
| equiangular triangle | A triangle with three congruent angles. |
| equilateral triangle | A triangle with three congruent sides. |
| exterior angle of a triangle | When the sides of a triangle are extended, tha angles that are adjacent to the interior angles of the triangle. |
| hypotenuse | In a right triangle, the side opposite the right angle. It is the longest side of a right triangle. |
| isosceles triangle | A triangle with at least two congruent sides. |
| legs of a right triangle | The sides that form the right angle. |
| legs of an isosceles triangle | The congruent sides of an isosceles triangle. |
| median of a triangle | A segment from a vertex to the midpoint of the opposite side. |
| obtuse triangle | A triangle with one obtuse angle. |
| Pythagorean Theorem | In a right triangle, the sum of the legs squared equal the hypotenuse squared. |
| right triangle | A triangle with one right angle. |
| scalene triangle | A triangle with no congruent sides. |
| triangle | A polygon with three sides. |
