Across
- 4. at least two sides are congruent
- 6. no sides are congruent
- 7. the acute angles of a right triangle are complementary
- 8. two lines that intersect at right angles
- 10. the sum of the measures of the interior angles of a triangle is 180
- 12. theorem that says: if 2 lines intersect to form a congruent linear pair, then the lines are perpendicular
- 13. all angles congruent
- 14. all sides congruent
Down
- 1. theorem that says: if 2 sides of 2 adjacent acute angles are perpendicular, then the angles are complementary
- 2. a triangle with one obtuse angle
- 3. if 2 lines are perpendicular, then they intersect to form four right angles
- 5. the measure of an exterior angle of a triangle is equal to the sum of the two nonadjacent interior angles
- 9. 3 acute angles
- 11. a triangle with one right angle