- A120
- B60
- C54
- D66
Step-by-Step Solution
The three angles together make a straight angle (180°): 55 + BOC + 65 = 180, so BOC = 180 - 120 = 60°.
Answer: B) 60
On a straight line, three angles AOB, BOC and COD are placed side by side at point O, together forming a straight angle.
If angle AOB = 55° and angle COD = 65°, find angle BOC.
Class 9Geometrical Terms and DefinitionsGeometry — Foundations
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