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# Lesson 9.1 Points, Lines, and Planes - PowerPoint PPT Presentation

Lesson 9.1 Points, Lines, and Planes. Point. A point is a location in space. Has no size Notation: A. Line. A series of points that extends in two directions without an end A line can be named with a lower case letter or two points with the line above Notation:. A. B. Plane.

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## PowerPoint Slideshow about ' Lesson 9.1 Points, Lines, and Planes' - channing-tyler

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Presentation Transcript

### Lesson 9.1 Points, Lines, and Planes

• A point is a location in space.

• Has no size

• Notation: A

• A series of points that extends in two directions without an end

• A line can be named with a lower case letter or two points with the line above

• Notation:

A

B

• A flat surface with no thickness

• Notation:ABCD (vertices) or Capital letter

• A part of a line

• Has two end points

• Notation:

Q

P

• Part of a line that has exactly one endpoint.

• Name its endpoint first.

• Notation:

C

R

- Designates a position.

Q

- At least two points

determine a line.

P

T

- Rays have exactly one

endpoint.

- Three

non-collinear points

determine a plane.

Plane QPT

- Line segments have

exactly two endpoints.

B

A

A

D

C

C

D

Parallel Lines

- Lines in the same plane that

do not intersect.

Intersecting Lines

• Lines that do not lie in the same plane.

• They are not parallel and do not intersect.

• Skew segments must be parts of skew lines.

N

P

R

M

S

T

V

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