Question 121766: Use the concept of slope to determine if the given figure is a parallelogram or a rectangle.
I do not understand how to determine this. I have a picture but I cannot paste it here. Can you help me with understanding the concept?
Answer by MathLover1(20850)   (Show Source):
You can put this solution on YOUR website! Rectangles are parallelograms, you can check their definitions.
For example, graph and label the following points:
A( , );
B( , );
C( , );
D( , ).
and prove if the figure forms a  , using  to do so:
find a slope of line that goes throug these two points:
A(,); D(,).
find a slope of line that goes throug these two points:
B(,); C(,);
 ……….
=> the figure does  because opposite sides  and  of figure  are  to one another; they have the   );
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