objective: relate parallel and perpendicular...
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3.3_Parallel_and_Perpendicular_Lines 2010
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3.3 Parallel and Perpendicular Lines
Objective: Relate parallel and perpendicular lines.
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What do you know about lines a, b and c? WHY?
What do you know about lines m, n and t? WHY?
a
bc
m
n
t
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Proof of Theorem 310
Given:
Prove:
rs
12 t
Statements Reasons
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For the following examples, a, b, c, and d are distinct lines in the same plane. Each example shows different combinations of relationships between a and b, b and c, and c and d. For each combination of the three relationships, how are a and d related?
Example #1: a || b, b c, c || d
Example #2: a b, b || c, c || d
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Homework: page 143 (1, 3, 14 21, 26 29)