Classifying Parallelograms Using Slope
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Given:Quadrilateral A(12, 8), B(11, 11), C(5, 18), D(6, 15)
  
Slope Formula
  
Problem:Determine the slope of all sides and the two diagonals to best classify quadrilateral ABCD.
Sides
mAB =  
mBC =  
mCD =  
mAD =  

Diagonals
mAC =  
mBD =  
 
Classification: