CHAPTER 1 REVIEW

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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

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

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 !)

Planes

M

Plane M

J

OR

H

Plane JHK

Plane JKH

K

Plane KJH

Plane KHJ

Plane HKJ

Plane HJK

Plane MKJ

What does each symbol mean?

line AB

AB

AB

ray AB

segment AB

no symbol means length

length of segment AB

A

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

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

A

B

C

If is between then

B

X

A

C

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

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

A

B

C

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

m

Postulate 9: two planes intersect in a line.

P

K

Theorem 1-2

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

A

B

C

Theorem 1-3

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

B

A

D

C