Seudónimo Seudónimo 10-02-2020 Mathematics contestada Which equation could be used to solve problems involving the relationships between the angles? A. 90 + (8a + 9) = (11 + 2a) B. 90 − (8a + 9) = (11 + 2a) C. (11 + 2a) − 90 = (8a + 9) D. (8a + 9) − (11 + 2a) = 90