given that AOB and COD are straight lines find the value of unknown in the figure.
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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 :)
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refer to this image hope it will help you
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