1. Vocabulary Unit 4 & 5

2. Equilateral/Equiangular Triangle A triangle with 3 congruent sides and 3 congruent angles

3. Isosceles Triangle A triangle with 2 congruent sides and 2 congruent angles

4. Scalene Triangle A triangle with no sides or angles congruent

5. Obtuse Triangle A triangle with exactly one obtuse angle

6. Right Triangle A triangle with exactly one right angle

7. Interior Angle An angle inside a triangle or polygon

8. Exterior Angle An angle outside a triangle or polygon

9. Perpendicular Bisector A ray, line, or line segment that is perpendicular to another line segment and goes through its midpoint

10. Angle Bisector A ray that divides an angle into 2 congruent angles

11. Median A segment that connects a vertex to the midpoint of the opposite side

12. Altitude A segment from a vertex to the opposite side that is perpendicular to that side Represents the height of a polygon

13. Point of Concurrency Three or more lines intersecting at a single (common) point

14. Midsegment A segment that connects the midpoints of the sides of a triangle Parallel to the 3 rd side and ½ its length