Question 175443
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          statement                        reason
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1.AB // DE, AD // EB                       1. given

2.quadrilateral ABED is a parallelogram    2. converse parallelogram th. if 
                                              opposite sides of a quadrilatral
                                              are parallel the quad is 
                                              parallelogram

3.BD is a diagonal of ABED                 3. def. of a diagonal

4.tri BAD is congruent to tri DEB          4. diagonals of paralleogram form
                                              two congruent triangles
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// stands for parallel