Question

Line segments AB and CD intersect at O such that AC || DB. If ∠CAB = 45° and ∠CDB =55°, then ∠BOD =
A. 100°
B. 80°
C. 90°
D. 135°

Answer 1

Answer:

B.80°

Step-by-step explanation:

<CAO and<OBD are alternate opposite angles therefore they are equal..THUS SUM OF ANGLE ODB AND ANGLE OBD IS EQUAL TO 100.. THEREFORE 180-100=80=<DOB

Answer 2

Answer:

80° is the right answer