1. Understanding Points, 1-1 Lines, and Planes Warm Up
Holt Geometry
Warm Up
Lesson Presentation
Lesson Quiz

2. Warm Up Graph each inequality.
What is the difference between an expression and an equation?
An expression doesn’t have an equal sign.
Simplify: -y+12x+3y-6x
2y+6x
3. Evaluate: x+3x+7x for x=-5
-55

3. Objectives
Identify, name, and draw points, lines, segments, rays, and planes.
Apply basic facts about points, lines, and planes.

4. Name What it is What it looks like How we name it
Point
Line
Plane
Segment
~No dimension
dot
Point D or D
~ One dimension
 Straight path that goes on forever
~ Two dimension Flat surface that extends forever
Plane V or
Plane RST
~ One dimension
Part of a line consisting of two endpoints

5. Consists of one endpoint
Name
What it is
What it looks like
How we name it
Ray
Opposite Rays
~ One dimension
Consists of one endpoint
and one line
Only correct answer:
Two rays with a common endpoint. Point in opposite directions. Form a straight line.

6. 1) Points that lie on the same line are collinear.
K, L, and M are collinear.
2) Points that do not lie on the same line are non-collinear
K, L, and N are non-collinear. M K L N

7. 3) Points that lie on the same plane are coplanar.
4)Points that don’t lie on the same plane are non-coplanar.

8. 5) Theorem- Proven to be true 6) Postulate/Axiom is a statement that is accepted as true without proof.

10. *Should remind you of solving a system of equations*

11. Think and discuss:
Line(s) 1 2 3 4 5
Regions 2 1 2

12. Think and discuss:
Line(s) 1 2 3 4 5
Regions 2 4 2 1 3 4

13. Think and discuss:
Line(s) 1 2 3 4 5
Regions 2 4 7

14. Think and discuss:
Line(s) 1 2 3 4 5
Regions 2 4 7 11

15. Think and discuss:
Line(s) 1 2 3 4 5
Regions 2 4 7 11 16