How do i solve this equation please help !!

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 represents the parent function of y=(x+2)(x-2)

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?