Can i get some with this math problem ?

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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.

Whats the name of the vertical axis

Gh bisects fgi. find the measure of hgi •15° •21° •10° •8°