tolong jawab no 32&33

32.
3a + 25 + 4a + 30 + 5a + 5 = 180
=> 12 a + 60 = 180
=> 12 a = 180 -60
=> 12 a = 120
=> a = 120/12
=> a = 10
sudut QOR = 4a + 30 = 4 . 10 + 30 = 40 + 30 = 70