alleryStart learning →Lines AB and CD cross at O. Angle AOC is (2x + 10)° and angle BOD is (3x - 20)°. What is angle AOD?
A70°
B100°
C110°
D120°
Answer & Solution
Correct answer: C. 110°
Vertically opposite angles are equal, so 2x + 10 = 3x - 20 and x = 30. Angle AOC is 70°, and angle AOD is its supplement, 110°.
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