1.2; 8-19 All 8. 30, 42 9. 15, 21 10. 2525; 3434; 4949 11. 121; 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

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

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

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

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

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.

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

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

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.

Lines, Segments, and Rays B A B A B A B

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

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