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
You are correct. We use SSS to prove the triangles congruent. The tickmarks tell us which sides are equal to one another. The third pair of congruent sides are the overlapping shared segments (which are congruent due to the reflexive property).
The answer is not it is not because if you use the vertical line test it does not pass and if you plotted the coordinates then x would repeat multiple times
Hope this helps
Have a great day/night
7x-23+11x+23=180
4x+0=180
4x/4=180/4
X=45
Answer: x=45
