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Example 4b

EXAMPLE 4. A . Name three points that are collinear. A. B , O , and X B. X , O , and N C. R , O , and B D. A , X , and Z. Example 4b. EXAMPLE 4. B. Are points X, O , and R coplanar?. A. yes B. no C. cannot be determined. Example 4c. EXAMPLE 4.

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Example 4b

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  1. EXAMPLE 4 A.Name three points that are collinear. A.B, O, and X B.X, O, and N C.R, O, and B D.A, X, and Z Example 4b

  2. EXAMPLE 4 B.Are points X, O, and Rcoplanar? A. yes B. no C. cannot be determined Example 4c

  3. EXAMPLE 4 C.How many planes appear in this figure? A. one B. two C. three D. four Example 4a

  4. EXAMPLE 4 A. point X B. point N C. point R D. point A Example 4d

  5. EXAMPLE 4 E.How many planes appear in this figure? Answer: There are two planes: plane S and plane ABC. Example 4

  6. Honors Geometry Today’s Agenda: • YOU WILL NEED COLORS TODAY! • Homework questions?? • 1.1 Partner Activity • 1.1 Continued • Homework WARM-UP: 1. Name a point non-coplanar with plane G. 2. Name a point contained in line n. 3. Name the line that intersects the plane containing points A, D, and C. 4. Name the plane containing lines n and p. E

  7. Expectations: • To be done in PENCIL! • Name, period, comment, and assignment at the top of the paper. • All work shown. This includes diagrams. • I expect you to check your answers at home on my webpage. (Correct you answers in a different color.) • I will grade a few problems for you to get credit. • Comment at the top in a different color. • Homework every night is worth 4 points.

  8. Partner Practice • Please grab 1white board, 1 marker, and 1 eraser for each pair. • Have one member of the pair with their back to the projector holding the white board. • The second member facing their partner. • The person facing the white board will try to describe the picture on the board to the partner whose back is to the projector. • Then switch.

  9. Example 1 L

  10. Example 2

  11. Example 3

  12. Example 4

  13. Example 5

  14. Challenge!

  15. Please put the white board and erasers away.

  16. Union (È): the union of 2 or more geometric figure is the set of points of the figures Intersection (Ç): the intersection of 2 or more geometric figures is the set of points they have in common. C A B Use Colors!

  17. Example 5 m T U S R

  18. Example 5 F C D A B E

  19. E

  20. More practice problems. *Go to website for answers Homework!

  21. EXAMPLE 4 B. Name three points that are collinear. Answer: Points A, B, and D are collinear. Example 4

  22. EXAMPLE 4 C. Are points A, B, C, and D coplanar? Explain. Answer: Points A, B, C, and D all lie in plane ABC, so they are coplanar. Example 4

  23. EXAMPLE 4 Answer: The two lines intersect at point A. Example 4

  24. Example 2

  25. Example 3

  26. Practice Example

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