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# CHAPTER 1 REVIEW - PowerPoint PPT Presentation

CHAPTER 1 REVIEW. POINT. M. Point M. Lines. Lines have infinite amount of points. O. N. M. A. 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. M. L.

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### CHAPTER 1 REVIEW

M

Point M

Lines have infinite amount of points

O

N

M

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 !)

M

Plane M

J

OR

H

Plane JHK

Plane JKH

K

Plane KJH

Plane KHJ

Plane HKJ

Plane HJK

Plane MKJ

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

If B is between A and C, then AB + BC = AC

A

B

C

If is between then

B

X

A

C

A line contains at least two points

Just a point…all alone, no line 

P

Two points are needed to make a line!

A plane contains at least three points not all in one line.

A

B

C

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

Postulate 7: Through any three non-collinear points, there is exactly one plane.

A

B

C

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

B

A

Postulate 9: two planes intersect in a line.

P

K

Theorem 1-2 in exactly

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

A

B

C

Theorem 1-3 in exactly

If two lines intersect, then exactly one plane contains the lines

B

A

D

C