# 9-gon pyramid

Calculate a nine-sided pyramid's volume and surface, the base of which can be inscribed with a circle with radius ρ = 7.2 cm and whose side edge s = 10.9 cm.

## Correct answer:

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Tip: Our volume units converter will help you convert volume units.

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

**algebra**- expression of a variable from the formula
**solid geometry**- pyramid
- surface area
**planimetrics**- Pythagorean theorem
- right triangle
- polygon
- area of a shape

### Units of physical quantities:

### Grade of the word problem:

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