triangle congruence
by Loren Walden
1. corollary- a theorem whose proof follows directly from another theorem.
2. equilateral triangle- a triangle with three congruent sides.
3. exterior angle- an angle formed by one side of a polygon and the extension of an adjacent side.
4. isosceles triangle- a triangle with at least two congruent sides.
5. right triangle- a triangle with one right angle.
6. acute triangle- a triangle with three acute angles.
7. congruent polygons- two polygons whose corresponding sides and angles are congruent.
8. interior angle- an angle formed by two sides of a polygon with a common vertex.
9. obtuse angle- an angle that measures greater that 90 degrees and less than 180 degrees.
10. scalene triangle- a triangle with no congruent sides.