Lesson 9.1 Points, Lines, and Planes

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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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Presentation Transcript

### 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
• A flat surface with no thickness
• Notation:ABCD (vertices) or Capital letter
Line Segment or Segment
• A part of a line
• Has two end points
• Notation:

Q

P

Ray
• Part of a line that has exactly one endpoint.
• Name its endpoint first.
• Notation:

C

R

Point Q

- 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

B

A

A

D

C

C

D

Parallel Lines

- Lines in the same plane that

do not intersect.

Intersecting Lines

Skew
• 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

Homework

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