1. 1.2; 8-19 All
8. 30, 42
9. 15, 21
; 3434; 4949
; 12,321; 1,234,321
12. 12; 1122; 111,222
13. Even
14. The middle integer
15. The next two shapes will have 14 diagonals and 20 diagonals
16. January 14th
17. (-4)(-5) = 20
18. 4x6 rectangle vs. 3x7 rectangle
19. 12, 12, 20 triangle

2. 1.3 Points, Lines and Planes
Goal:
Use postulates and undefined terms.

3. Key Words Undefined Terms Postulate Collinear Coplanar
Common terms that cannot be mathematically defined using other known words.
Postulate
Statement that is accepted without further justification.
Collinear
Lying on the same line
Coplanar
Lying on the same plane

4. Key Words Point Line Plane No dimension Written as: point A
One dimension
Written as: line l or
Plane
Two dimensions
Written as: plane M or plane DEF

5. Two Points Determine a Line
Postulate 1
Two Points Determine a Line
Through any two points there is exactly one line.

6. Three Points Determine a Plane
Postulate 2
Three Points Determine a Plane
Through any three points not on a line there is exactly one plane.

7. Name Points, Lines and Planes
Use the diagram to do the following:
Name three points
Name two lines
Name two planes
D, E, and F are points
Line m and Line p or
Q and R are planes

8. Name Collinear and Coplanar Points
Use the diagram to do the following:
Name three points that are collinear
Name four points that are coplanar.
Name three points that are not collinear.
Points D, E, and F are collinear
Points D, E, F and G are coplanar
Points H, E, and G do not lie on same line

9. Name Points, Lines and Planes
Name two lines.
Name two planes.
Name three points that are collinear.
Name three points are not collinear.
Name four points that are coplanar.
Name two lines that are coplanar.

10. Lines, Segments, and RaysB A B A B A B

11. Draw Lines, Segments, and Rays
Draw three noncollinear points, J, K and L.
Then draw and

12. Homework DAY 1 1.3 pgs. 17-19; 16-44 Even, 58-62 All Day 2
1.3 Vocabulary Worksheet