points lines and planes

point

• A position on a paper or a position on space, no size

• - Marked by upper case letter

•. •

A B

line

• An infinite number of points

<—--------—--------—--------------------->

A B

Arrows indicate the direction of the line

The arrows also show there's no eneding

• The line can be called AB or BA

<—--------—-----------—--------------------->

If no point, line will be called line L

collinear points

Points that lie on the same line

A B C

non colinear points

 Points that don’t lie on the same line

B

A C

plane

an infinite number of lines

• Flat surface that extends in all directions

—-—-—-—-—-

|         Q |

| E. |

|   F           G |

—-—-—-—-—-

 

-plane Q

Plane FEG

Plane GEF

coplanar

Points that lie on the same plane

Line segments

section of line that has specified ends

•—-----------------------------•  - endpoints

G     H

GH or HG

rays

 A line that as fixed starting point, but no end point

•—--------------•--------------->. GH

G     H

<—--------------------------------• HG

    G     H

opposite rays

two rays that share the same initial point and extend infinitely in opposite directions along the same line.

• If point 𝐶 lies on  𝐴𝐵 between 𝐴 and 𝐵, then 𝐶𝐴 and 𝐶𝐵 are _____

INTERSECTION

One or more points laying on two or more geometric figured

point

An intersection of two distinct line is a _

line

An intersection of two distinct plane is a _