1. LINE SEGMENTS, RAYS, AND ANGLES Topic 9 Lesson 9-2

2. LINE SEGMENTpart of a line with two endpoints A B

3. Name a line segment? E F G H J

4. Were you correct? EF G J H Answers could be: EG, GE, GF, FG, GJ, JG, GH, HG, EJ, JE, HF, FH

5. RAYa part of a line that has one endpoint and continues on forever in one direction C D

6. ANGLEa figure formed by two rays that have the same endpoint

7. There are 4 types of angles. obtuse straight acute right

8. RIGHT ANGLEis a square corner and equals 90 degrees

9. STRAIGHT ANGLEforms a straight line and is equal to 180 degrees

10. ACUTE ANGLEis less than a right angle or less than 90 degrees

11. OBTUSE ANGLEis greater than a right angle or greater than 90 degrees

12. VERTEXthe common endpoint of the two rays that form the angle When naming an angle, name the points in the correct order with the vertex of an angle always in the middle. Example: PQT PQ S U R T

13. Name an acute angle. EF G H J

14. Did you get . . . EGHorFGJ

15. Name an obtuse angle. E F G J H

16. Did you say . . . EGF or HGJ

17. To name a straight angle you would say … C D E C D E

18. Now you understand line segments, rays, and angles! Time to tackle your homework.