Answer :
It is found that Line segment QR is part of Line QS. Point Q is the vertex of angle
What is a line segment?
A line segment is a straight line with finite length, and thus, have to endpoints(points on either ends).
The point of their joint is called vertex of that angle.
If the ray lies onto the considered line segment(overlapping), then it can be said belonging to the considered line segment.
A line segment has 2 fixed ends, whereas a ray has one end only, other end is not fixed.
We can conclude that Line segment QR is part of Line QS. Point Q is the vertex of angle
Learn more about a point dividing a line segment in a ratio here:
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