Question

given that AOB and COD are straight lines find the value of unknown in the figure.​

Answer 1

Answer:

y° = (7x - 20°) Vertically Opposite Angles

AOC = 3x°. Vertically Opposite Angles

AOD + DOB + BOC + AOC = 360°

7x - 20℃ + 7x - 20° + 3x + 3x = 360°

20x - 40° = 360°

20x = 360° + 40°

20x = 400°

x = 400/20

x = 20°

AOD = 7x - 20

= 7(20)-20

= 140° - 20°

= 120°

AOD = COB = 120°

DOB = 3x

= 3(20)°

= 60°

DOB = AOC = 60°

Hope it helps you :)

Answer 2

Answer:

refer to this image hope it will help you