- A50°
- B30°
- C140°
- D40°
Step-by-Step Solution
OA is on 0 of the outer scale (0 on the right), so read the same outer scale where OB crosses it: 40°. (140° is the inner-scale number at the same place.)
Answer: D) 40°
On the protractor shown, arm OA sits on the 0 line. Find ∠AOB.
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