# Regular n-gon

Which regular polygon has a radius of circumscribed circle r = 10 cm and the radius of inscribed circle p = 9.962 cm?

### Correct answer:

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#### You need to know the following knowledge to solve this word math problem:

**planimetrics**- Pythagorean theorem
- right triangle
- circle
- polygon
- triangle
**goniometry and trigonometry**- sine
- cosine
- tangent

#### Units of physical quantities:

#### Grade of the word problem:

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