# The roof

The house's roof has the shape of a regular quadrilateral pyramid 5 m high and the edge of the base 7 m. How many tiles with an area of 540 cm

^{2}are needed?## Correct answer:

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

**arithmetic**- square root
- division
- rounding
**solid geometry**- pyramid
- surface area
**planimetrics**- Pythagorean theorem
- right triangle
- area of a shape
**numbers**- fractions

### Units of physical quantities:

### Grade of the word problem:

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