Activity

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Activity

• Each group member grab a marker.
• Red draw a random point on the whiteboard and
  name it - Earth
• Yellow draw a random point on the whiteboard and
  name it - Sun
• Blue draw a random point on the whiteboard and
  name it - Moon
• Green draw a random point on the whiteboard and
  name it Mars
• Draw 4 random points on the whiteboard and label
  it A, B, C, D
• Draw the fastest way to go from Earth to Moon,
  and Mars to the Sun
• Look at your drawings and determine if you agree
  or disagree on this statement
• A straight line is always the fastest way to go
  from one place to another in a 2D world

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Chapter 1.3 Points, Lines, and Planes

• 1.0 Demonstrate understanding by identifying and
  giving examples of undefined terms and axioms

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What do you think this is a picture of? Where do
you think its located?
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Vocabulary

• Space set of all points
• Example Look at the space picture
• Point Point is a location. A point has no size
• Example .P
• Line Line is a series of points that extend in
  two directions without end.

t
B
A
Line t
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Vocabulary

• Collinear points Points that lie on the same line

Naming the line
Naming the line
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Example

• Are points P and S collinear?
• Are points U and T collinear?
• Are points Q, S, T collinear?
• Are points U, P V collinear?

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Vocabulary

• Plane flat surface that has no thickness
• Coplanar Points and lines in the same plane

R
B
C
A
Naming the plane Plane ABC or Plane R
Note you need 3 points
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Naming a plane

• Name a plane

B
D
A
C
H
E
G
F
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Vocabulary

• In geometry you will have many postulate or
  axioms.
• Postulate or axiom an accepted statement of fact

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Postulate 1.1

• Through any two points there is exactly one line

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Postulate 1.2

• If two lines intersect, then they intersect in
  exactly one point.

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Postulate 1.3

• If two planes intersect, then they intersect in
  exactly one line

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Postulate 1.4

• Through any three noncollinear points there is
  exactly one plane

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(No Transcript)
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Homework

• P19 2, 6, 9, 12, 16, 18, 20, 23, 30, 34, 35