Plz look at the pic 2 answer question ASAP

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.

What describes horizontal cross section of the right rectangle 6m 8m 5m

Write the rational number in lowest terms 99/-15