- A66
- B60
- C54
- D120
Step-by-Step Solution
Three angles on one side of a line at O sum to 180°: 50 + 70 + third = 180, so third = 180 - 120 = 60°.
Answer: B) 60
Three straight lines pass through a point O, making 6 angles around it. On one side of one of the lines lie three adjacent angles; two of them are 50° and 70°. Find the third angle (in degrees).
Class 9Linear Pair and Vertically Opposite AnglesGeometry — Lines and Angles
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