# Lesson 1-2: Points, Lines, & Planes ```Warm-up 1-2: (Do not write questions)
Find a pattern for each sequence. Use the pattern
to show the next two terms or figures.
1)
2)
3, –6, 18, –72, 360
Make a table of the sum of the first 4 counting numbers. Use
your table and inductive reasoning to find the following:
3)
the sum of the first 10 counting numbers
Show that the conjecture is false by finding one counterexample.
4)
The sum of two prime numbers is an even number.
Lesson 1-2: Points, Lines, &amp; Planes
Objectives: (Do not write)
• Students will identify and correctly name points lines and
planes
• Students will recognize the shapes formed by the
intersection of lines and planes.
Vocab
Term
Point
Space
Line
Collinear
Plane
Coplanar
Postulate
(axiom)
Definition
Own Word
Symbols
• Point
• Line
• Plane
Postulates (axioms)
1) .
2) .
3) .
(Try drawing them to see…)
In Class Examples
1) Draw line l. Create 3 collinear points A,
B, C on line l. Then name line l in three
other ways.
2) Sketch a line that intersects a plane at one point.
3) What is the intersection of planes HGF and BCG?
How to draw a box:
Draw a rectangle for
the front, and a
rectangle for the back
– connect the
corners, make dashes
where appropriate.