- A70°
- B110°
- C60°
- D50°
Step-by-Step Solution
Above the horizontal line the three angles make a straight angle, so the third one is . The angle is vertically opposite it, so .
Answer: A) 70°
Three straight lines meet at the point O. Two of the angles are 50° and 60°, as marked. Find the angle marked .
Class 7Adjacent and Vertically Opposite AnglesLines and Angles
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