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Objectives: Students will analyze and identify angle pairs formed by three intersecting lines. Why? So you can classify lines in a real world situation. Mastery is 80% or better on 5-minute checks.
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Draw the picture and answer the questions
Objectives: Students will analyze and identify angle pairs formed by three intersecting lines. Why? So you can classify lines in a real world situation.Mastery is 80% or better on 5-minute checks.
p
m n Like train tracks
Like layers of a cake
Like a highway overpass
Like a street crossing train tracks
Skill DevelopIdentifying Relationships in
Space Think of each
segment in the diagram. Which appear to fit the description?
a. Parallel to AB and contains D
b. Perpendicular to AB and contains D
c. Skew to AB and contains D
d. Name the plane(s) that contains D and appear to be parallel to plane ABE
A
B
D
C
F
E H
G
Guided-Pair Share
G
H
Let’s see how you did…G
H
Skill DevelopPostulate 13: Parallel
Postulate• If there is a line and a point not on
the line, then there is exactly one line through the point parallel to the given line.
P
l
This is a symbol for lines being
parallel
This is another symbol for lines
being parallel
Skill DevelopPostulate 14: Perpendicular
Postulate• If there is a line and a point not on
the line, then there is exactly one line through the given point perpendicular to the given line.
l
P
More VocabularyThe following definitions deal with different angle relationships formed by intersecting lines
corresponding
alternate interior
alternate exterior
consecutive interior
Also referred to as same side interior or SSI angles
All of these relationships refer to
position of the angles and have
nothing to do with their measure
GuidedIdentifying Angle relationships• List all pairs of
angles that fit the description.
a. Correspondingb. Alternate exteriorc. Consecutive
interiord. Alternate interior
3
7
2
61
5
4
81
5
2
64
83
7
There are 4 sets
There are 2 sets
There are 2 sets
There are 2 sets
18
2
7
64
53
Pair Share: List all angle relationships below.
Performance TaskThere are
4 sets
There are 2 sets
There are 2 sets
What was our objective today???
HomeWork
• Pages 150-151
• # 1-33 all
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