Answer must be in simplest form in the form of a fraction

How do you answer this question? (step by step)

Alex drew a circle with right triangle prq inscribed in it, as shown below: the figure shows a circle with points p, q, and r on it forming an inscribed triangle. side pq is a chord through the center and angle r is a right angle. arc qr measures 80 degrees.

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)