Answer:
Step-by-step explanation:
A parallelogram is a family of quadrilateral which has its two opposite sides to be equal and parallel.
In the given parallelogram, the following proof can be deduced.
1. QS bisects RT: <RSQ ≅ <TQS                    Given
2. RV ≅ TV                                                      Definition of a bisector
3. <SRQ + < RQT = 
                                  Definition of supplementary angles
4. <RQS ≅ <QST                                             Definition of alternate angles
5. <RVT ≅ <QVT                                             Vertically opposite angles
6. <QRS ≅ <STQ                                             Opposite angles are congruent
7. QRST is a parallelogram                             Proofed