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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
point
Point
  • A point is a location in space.
  • Has no size
  • Notation: A
slide3
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
Plane
  • A flat surface with no thickness
  • Notation:ABCD (vertices) or Capital letter
line segment or segment
Line Segment or Segment
  • A part of a line
  • Has two end points
  • Notation:

Q

P

slide6
Ray
  • Part of a line that has exactly one endpoint.
  • Name its endpoint first.
  • Notation:

C

R

slide7

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.

slide8

B

B

A

A

D

C

C

D

Parallel Lines

- Lines in the same plane that

do not intersect.

Intersecting Lines

slide9
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
Homework

Page 445 (1-21) all

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