Answer:
angle O = 36 degrees
angle N = 54 degrees
Step-by-step explanation:
90 degrees = angle O and N
2a + 18 + 5a + 9 = 90
7a + 27 = 90
7a = 63
a = 9
2(9) + 18 = 36 degrees
5(9) + 9 = 54 degrees
