The interior angle of a regular polygon is 150 degrees. How many sides does it have?
Answer and explanation
Correct answer: D. 12
- Step 1: Exterior angle = 180 - 150 = 30 degrees. Step 2. Number of sides = 360/30 = 12. Answer: 12. Why not the others: 10: A regular decagon has interior angles of 144 degrees. 8: A regular octagon has interior angles of 135 degrees. 15: A regular 15-sided polygon has interior angles of 156 degrees.
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