An astronomer’s work should explain past astronomical observations as well as a. verify hypotheses. b. predict future observations. c. describe the past. d. perform calculus upon observations.

Rectangle qrst is shown. angle qrt is congruent to angle str, and angle str is complementary to angle qtr. which statement is true about angles qrt and qtr? they are congruent. they are complementary. they are supplementary. they are right angle