Answer:
<h2>37°</h2>
Step-by-step explanation:
We know that
and
are opposite angles in a quadrilateral.
If we assume that the quadrilateral is a parallelogram, then those angles are equal, so

Then, we solve for 

Now, we use this value to find VST angle

On the other hand, the sum of all four internal angles can be expressed as

Solving for SVT

Therefore, the answer is 37°.