# Ladder

Adam placed the ladder of the house, the upper end reaching the window at the height of 3.6m, and the lower end standing on level ground and distant from a wall of 1.5m. What is the length of the ladder?

### Correct answer:

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

**arithmetic**- square root
- square (second power, quadratic)
**planimetrics**- Pythagorean theorem
- right triangle
- triangle

#### Units of physical quantities:

#### Grade of the word problem:

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