Select the correct answer. adam constructed quadrilateral pqrs inscribed in circle o. how can he prove pqrs is a square? a. he needs to show only that the diagonals are perpendicular. b. he needs to show only that the diagonals are perpendicular and congruent. c. he needs to show only that the diagonals are perpendicular and bisect each other. d. he needs to show that the diagonals are perpendicular, congruent, and bisect each other. reset next previous 1 next inscribed polygons: mastery test submit test tools info © 2020 edmentum. all rights reserved.