# Observer

The observer sees a straight fence 100 m long in 30° view angle. From one end of the fence is 119 m.

How far is it from another end of the fence?

How far is it from another end of the fence?

## Correct answer:

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Do you have a linear equation or system of equations and are looking for its solution? Or do you have a quadratic equation?

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See also our trigonometric triangle calculator.

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

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

**algebra**- equation
**arithmetic**- multiplication
- division
**planimetrics**- triangle
- The Law of Sines
**basic functions**- ratio
- percentages
**numbers**- real numbers
**goniometry and trigonometry**- sine
- arcsine

### Units of physical quantities:

### Grade of the word problem:

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