In Exercises 19 to 24, complete each proof.
Given:  Quadrilateral

Prove: 

PROOF  
Statements  Reasons 
1. ?  1. Given 
2. Draw

2. Through two points, there is one line 
3. In

3. ? 
4. ?  4. If two lines are

To complete:
The proof in the following table.
PROOF  
Statements  Reasons 
1. ?  1. Given 
2. Draw 
2. Through two points, there is one line 
3. In 
3. ? 
4. ?  4. If two lines are 
Given,
Quadrilateral ABCD, with midpoints E, F, G, and H of the sides
Completion of the proof,
PROOF  
Statements  Reasons 
1. Quadrilateral ABCD with midpoints E, F, G and H of the sides.  1. Given 
2. Draw 
2. Through two points, there is one line 
3. In 
3. If a line segment divides two sides of a triangle proportionally, then the line segment is parallel to the third side of the triangle. 
4. 
4. If two lines are 
Final statement:
Therefore, the completed proof is,
PROOF  
Statements  Reasons 
1 
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