Problem 113 of 7
Find the central angle for a regular 20-gon inscribed in a circle.
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divide 360 degrees by number of sides.
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Number of sides must be at least 3.
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Solution
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1. A full circle has 360 degrees.
2. A regular inscribed polygon divides the circle into equal central angles.
3. Divide 360 by the number of sides.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Using interior angle formula when central angle is requested.