- ANo, it is 50°
- BNo, it is 140°
- CNo, it is 190°
- DYes, it is 90°
Step-by-Step Solution
Neither arm is on 0, so subtract readings on one scale: OB at 140 and OA at 50 on the outer scale. 140 − 50 = 90°, a right angle.
Answer: D) Yes, it is 90°
Arms OA and OB are both drawn on this protractor. Is ∠AOB a right angle?
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Arm OA is on the left of the base line. What is the measure of ∠AOB?Which is the best estimate of the size of ∠AOB?Without measuring, which angle is larger: ∠AOB or ∠BOC?In the figure, ∠AOB = 35° and ∠BOC = 50°. What is ∠AOC?Arms OA and OB cross the protractor scale as shown, and neither is on 0. What is ∠AOB?