Lesson 9 1 points lines and planes
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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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Lesson 9 1 points lines and planes

Lesson 9.1 Points, Lines, and Planes


Point
Point

  • A point is a location in space.

  • Has no size

  • Notation: A


Lesson 9 1 points lines and planes
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


Lesson 9 1 points lines and planes
Ray

  • Part of a line that has exactly one endpoint.

  • Name its endpoint first.

  • Notation:

C

R


Lesson 9 1 points lines and planes

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.


Lesson 9 1 points lines and planes

B

B

A

A

D

C

C

D

Parallel Lines

- Lines in the same plane that

do not intersect.

Intersecting Lines


Lesson 9 1 points lines and planes
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

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