Question 173442This question is from textbook  
:  given triangle ABC and segment DE, if AD =2, DB =3, AE =4 and EC =4, is DE parallel to BC? 
This question is from textbook  
 Answer by nycsub_teacher(90)      (Show Source): 
You can  put this solution on YOUR website! The "Triangle Proportionality Theroem" states: If a line is parallel to one side of a triangle and intersects the other two sides in two distinct points, then it separates these sides into segments of proportional length.
 
AD/DB does not equal AE/CE
 
AD = 2
 
DB = 3
 
AE = 4
 
EC = 4
 
We now have two fractions:
 
2/3 and 4/4
 
QUESTION:
 
Are these two fractions the same?
 
No, right?
 
So, the answer to your question is NO: DE is NOT parallel to BC
 
 
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