What is the value of x?
F/53°
45°

Which ratio is equivalent to 10: 85

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.

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?