15 ! 1. quadrilateral opqr is inscribed inside a circle as shown below. what is the measure of angle o? you must show all work and calculations to receive credit. (10 points) circle n is shown with an inscribed quadrilateral labeled opqr. o is labeled 2x degrees. p is labeled y degrees. q is labeled 2 2. using the following equation, find the center and radius of the circle. you must show all work and calculations to receive credit. x2 + 2x + y2 + 4y = 20 (10 points)