1'1 Points, Lines, and Planes 9808

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1.1 Points, Lines, and Planes 9/8/08

• A point is a location.
• A line is made up of points.
• No thickness or width.
• Points on the same line are collinear.
• A plane is a flat surface made up of points.
• Has no depth.
• Extends infinitely in all directions.
• Points that lie on the same plane are coplanar.

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B
n
A
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Name Lines and Planes

• Use the figure to name each of the following.
• a.) a line containing point A.
• b.) a plane containing point C.

l
D
C
B
A
N
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Name Lines and Planes

• Answers
• a. A line containing point A.
• line l

• A plane containing point C.
• plane N
• plane ABE
• plane ACE
• plane ADE
• plane BCE
• plane BDE
• plane CDE
• the letters of these names can be reordered ex.
  Plane AEB, plane BEA, etc.

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More Practice!!!

• Classwork Textbook p. 9 7 9, 13 - 18
• Homework Reading to learn (RTL) 1.2 and
  complete notes for 1.2