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## PowerPoint Slideshow about ' CHAPTER 1 REVIEW' - imani-huffman

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B

Notation: AB or BA

not CB, CA, BC or AC !

A Line segment consists of two endpoints and all the points between those endpoints.C

L

Ray : part of a line consisting of ONE endpoint and all points on one side of the line .A

named LM or LA

(not AM, MA or ML !)

What does each symbol mean?

line AB

AB

AB

ray AB

segment AB

no symbol means length

length of segment AB

R

P

Practice – What’s in a name?List all of the possible names for each shape

<ARP

<PRA

<R

<RAP

<ILO

<OLI

<L

<LIO

I

O

1

N

2

L

Name this angle

Parallel lines – Coplanar lines that never intersect

Postulate 5

A line contains at least two points

Just a point…all alone, no line

P

Two points are needed to make a line!

Postulate 5

Space contains at least four points not all in one plane.

Postulate 8

If two points are in a plane, then the line that contains the points is in that plane

B

A

Theorem 1-1: If two lines intersect, then they intersect in exactly ONE POINT !

A

Theorem 1-2 in exactly

Through a line and a point not in the line, there is exactly one plane.

A

B

C

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