# How far

From the top of a lighthouse 145 ft above sea level, the angle of depression of a boat is 29°. How far is the boat from the lighthouse?

### 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**- right triangle
- triangle
**basic functions**- percentages
**goniometry and trigonometry**- tangent
- cotangent

#### Units of physical quantities:

#### Grade of the word problem:

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