1. 1.2 Geometry Definitions

2. Geometry Symbols

3. 1.Collinear- ________________________________ 2.Non-Collinear- ____________________________ 3.Coplanar- ________________________________ 4. Distance- ________________________________ __________________________________________ Definitions -1123

4. 5. Segment- _____________________________ _______________________________________ 6. Ray- _________________________________ Opp Ray- _____________________________ _______________________________________ 7. Congruent- ___________________________ 8. Midpoint- _____________________________

5. 9. Bisector- _____________________________________ -____________________________________

6. 10. Angle- _____________________________________ Acute: _____________________________ Obtuse: ____________________________ Right: ______________________________ Straight: ____________________________

7. 11. Vertical Angles- ____________________________ _______________________________________________ 12. Adjacent Angles: ___________________________ _______________________________________________ 13. Supplementary- ________________________ 14. Complementary- _______________________ 15. Perpendicular- _____________________________ 1 2

8. Note: ___________________________________ _________________________________________ 16. Plane- __________________________________ _____________________________________________

9. Examples 1. There is a Right angle at each corner of PRST. a) if angle TPO=60: RPO= ? b) if angle PTO=70: STO= ? c) if angle TOP=50: POR= ? TS O P R

10. 1.If CBD DBE and BD bisects CBE find CAB= ? C ABE D X+5 X+10 60

11. 3. Solve for y in terms of x. 1 2

12. AB D C

13. F G J H

14. C B A 1 2 3

15. 1.3 and 1.4 Segment and Angle Addition Postulates

16. Define First: Definition: _________________________ Postulate: ___________________________________ ___________________________________ Theorem- ___________________________________ ___________________________________

17. Segment Addition Postulate _______________________________________________ A B C If B is between A and C then:

18. Angle Addition Postulate _______________________________________________ A If B lies on the interior of angle AOC then: or C B O B AOC

19. Examples B is between A and C, with AB=x and BC=2x+5. If AC=35: Find x and BC A B C

20. M A T K L 3 2 1

21. 1.5 Postulates &Theorems

22. You do not need to memorize the numbers, just know what the theorem or postulate says! Postulate 5 - ______________________________________ ______________________________________ _____________________________________

23. Postualte 6: _______________________________________ ________________________________________ Postualte 7: ________________________________________ __________________________________________ Postualte 8: _________________________________________ __________________________________________

24. Postualte 9: _____________________________________ ______________________________________ Theorem 1.1: ______________________________________ _______________________________________ Theorem 1.2: _____________________________________ ______________________________________

25. Theorem 1.3: ______________________________________ _______________________________________ Theorem 1.4: _______________________________________ ________________________________________

26. x T S RW y m Is TW on plane m? Are TSW coplanar? Are RWY coplanar? Where does XY intersect plane m? How many lines contain point T and S? How many planes contain T, S and X? o

27. R s A B Where do planes R & S intersect? E R S A B C D H G F Name 3 lines that intersect E? Name 2 planes that intersect at FG? Name 2 planes that don’t intersect? Are points RSGC coplanar?