Question

Two lines AB and CD intersect each other at a point O such that the ratio of the angle AOC and angle AOD is equal to 5:7,find the angle COB​

Answer 1

Answer:

Angle COB = 105

Step-by-step explanation:

Let angle be x therefore AOD be 7x and AOC be 5x

Angle AOD + Angle AOC = 180 ( linear pair)

7x + 5x = 180

12x = 180

X = 180/12

X = 15

AOD = 7*15 = 105

AOD = COB = 105 (vertically opposite angle)