Parallel Lines Proportionality Theorem

Applet accompanies an in-class activity sheet that allows for students to informally discover 2 theorems: 1) If parallel lines cut off proportional segments on one transversal, then they cut off proportional parts on every transversal. 2) A line drawn parallel to one side of a triangle breaks the other 2 sides up into segments that are in proportion to each other.

 

Tim Brzezinski

 
Target Group (Age)
11 – 15
Language
English
 
 
 
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