# Ch. 5 Math Vocabulary - 2

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1. The sum of the angles in EVERY triangle is 180 degrees
Triangle Sum Theorem
2. Triangle has 3 acute angles
Acute
3. Triangle that has 2 acute angles and 1 obtuse angle
Obtuse
4. Triangle that has 2 angles and 1 right angle
Right
5. Triangle that has 3 congruent sides
Equilateral
6. Triangle that has 2 congruent sides
Isosceles
7. Triangle that has NO congruent sides
Scalene
8. The sum of the lengths of any 2 sides of a triangle must be greater than the length of the 3rd side
Triangle Inequality Theorem
9. Lines in a plane that never intersect are called
Parallel lines
10. Lines in a plane that form right angles when they intersect are called
Perpendicular lines
11. A line that passes through 2 or more lines
Transversal
12. For two lines intersected by a transversal, a pair of angles that lie on the same side of the transversal and on the same sides of the other two lines
Corresponding angles
13. For two lines intersected by a transversal, a pair of angles that lie on opposite sides of the transversal and outside the other two lines
Alternate exterior angles
14. For two lines intersected by a transversal, a pair of nonadjacent angles that lie on opposite sides of the transversal and between the other two lines
Alternate interior angles
 Author: BJHS ID: 336418 Card Set: Ch. 5 Math Vocabulary - 2 Updated: 2017-12-05 19:22:23 Tags: Angles Triangles Folders: Description: Ch. 5 Math Vocabulary - 2 Show Answers: