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Arm OA is on the left of the base line. What is the measure of ∠AOB?

Class 6Measuring AnglesGeometry
  • A165°
  • B25°
  • C15°
  • D5°

Step-by-Step Solution

OA on the left means the inner scale. OB is at the middle mark between 10 and 20 on that scale: 15°.
Answer: C) 15°

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