7.4 ­ Parallel Lines and Proportional Parts.notebook
January 13, 2014
"Do Now"
1. Solve the problem to the
right.
2. Read the new Quote of the
Week.
3. How are you going to
study / already studying for
the test next class?
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7.4 ­ Parallel Lines and Proportional Parts.notebook
January 13, 2014
Go over Quizzie Poos
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7.4 ­ Parallel Lines and Proportional Parts.notebook
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7.4 ­ Parallel Lines and Proportional Parts.notebook
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7.4 ­ Parallel Lines and Proportional Parts.notebook
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7.4 ­ Parallel Lines and Proportional Parts.notebook
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7.4 ­ Parallel Lines and Proportional Parts.notebook
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May the (geometric) force be with you
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7.4 ­ Parallel Lines and Proportional Parts.notebook
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7.4 ­ Parallel Lines and Proportional Parts.notebook
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7.4 ­ Parallel Lines and Proportional Parts.notebook
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7.4 ­ Parallel Lines and Proportional Parts.notebook
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7.4 ­ Parallel Lines and Proportional Parts.notebook
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7.4 ­ Parallel Lines and Proportional Parts.notebook
January 13, 2014
Today's Goal:
In Charleston, SC, Logan Street is parallel to both King Street and
Smith Street between Beaufain Street and Queen Street.
What is the distance from Smith to Logan along Beaufain?
Round to the nearest foot.
778 ft
733 ft
839 ft
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7.4 ­ Parallel Lines and Proportional Parts.notebook
January 13, 2014
Geogebra Exploration
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7.4 ­ Parallel Lines and Proportional Parts.notebook
January 13, 2014
Unit 8: Proportions and Similarities
7.4 Parallel Lines and Proportional Parts
Triangle
Proportionality
Theorem
Date
If a line is parallel to a side of a triangle and
intersects the other two sides, then it divides
those two sides proportionally.
Converse
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7.4 ­ Parallel Lines and Proportional Parts.notebook
January 13, 2014
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7.4 ­ Parallel Lines and Proportional Parts.notebook
January 13, 2014
Special Case of Triangle Proportionality
Theorem
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7.4 ­ Parallel Lines and Proportional Parts.notebook
Triangle Midsegment
Theorem
January 13, 2014
A midsegment of a triangle is parallel to one
side and its length is half the length of that side.
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7.4 ­ Parallel Lines and Proportional Parts.notebook
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7.4 ­ Parallel Lines and Proportional Parts.notebook
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Another Special Case of Triangle
Proportionality Theorem
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7.4 ­ Parallel Lines and Proportional Parts.notebook
Proportional
Parts of Parallel
Lines
January 13, 2014
If three or more parallel lines intersect two
transversals, they cut off the transversals
proportionally.
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7.4 ­ Parallel Lines and Proportional Parts.notebook
January 13, 2014
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7.4 ­ Parallel Lines and Proportional Parts.notebook
January 13, 2014
Georgetown, SC
? ft
528 ft
? ft
? ft
528 ft
528 ft
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7.4 ­ Parallel Lines and Proportional Parts.notebook
Congruent Parts of
Parallel Lines
January 13, 2014
If three or more parallel lines cut one
transversal into congruent segments, then
they cut the other transversal into congruent
segments.
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7.4 ­ Parallel Lines and Proportional Parts.notebook
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7.4 ­ Parallel Lines and Proportional Parts.notebook
January 13, 2014
Exit Slip
In Charleston, SC, Logan Street is parallel to both King Street and
Smith Street between Beaufain Street and Queen Street.
What is the distance from Smith to Logan along Beaufain?
Round to the nearest foot.
778 ft
733 ft
839 ft
Explain how you got your answer.
Why are you allowed to arrive at your answer?
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7.4 ­ Parallel Lines and Proportional Parts.notebook
January 13, 2014
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