In Exercises 2730, use the definition of a parallelogram to
complete each proof.
Given:
Prove: RSTV is a parallelogram
PROOF  
Statements  Reasons 
1.

1.? 
2.?  2.Given 
3.?  3.If two lines are

4.?  4.If both pairs of opposite side of a quadrilateral are

To prove:
The quadrilateral RSTV is a parallelogram.
Given:
In the quadrilateral RSTV,
PROOF  
Statements  Reasons 
1. 
1.? 
2.?  2.Given 
3.?  3.If two lines are 
4.?  4.If both pairs of opposite side of a quadrilateral are 
Corollary:
The opposite sides of a parallelogram are congruent.
From the given quadrilateral RSTV,
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