# Observer

The observer sees a straight fence 100 m long in 30° view angle. From one end of the fence is 102 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 looking for its solution? Or do you have a quadratic equation?

Do you want to convert length units?

See also our trigonometric triangle calculator.

#### 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
**numbers**- real numbers
**goniometry and trigonometry**- sine

#### Units of physical quantities:

#### Grade of the word problem:

We encourage you to watch this tutorial video on this math problem: video1

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