# Glass mosaic

How many dm

^{2}glasses are necessary to produce 97 slides of a regular 6-gon, whose side has a length 21 cm? Assume that cutting glass waste is 10%.## Correct answer:

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Try conversion angle units angle degrees, minutes, seconds, radians, grads.

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

**planimetrics**- Pythagorean theorem
- right triangle
- polygon
- area of a shape
- triangle
**basic functions**- percentages

### Units of physical quantities:

### Grade of the word problem:

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