Civil Service Exam Reviewer · Measurement and Geometry · medium
What is the measure of each interior angle of a regular polygon with 9 sides?
- 40°
- 140°
- 1260°
- 50°
Answer
B. 140°
Solution
Each angle = (n − 2) × 180° ÷ n = 1260 ÷ 9 = 140°.
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