# Calculate 5148

At a distance of 10 m from the river bank, they measured the base AB = 50 m parallel to the bank. Point C on the other bank of the river is visible from point A at an angle of 32°30' and from point B at an angle of 42°15'. Calculate the width of the river.

### Correct answer:

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

**geometry**- similarity of triangles
**algebra**- system of equations
- expression of a variable from the formula
**planimetrics**- triangle
**goniometry and trigonometry**- tangent

#### Units of physical quantities:

#### Grade of the word problem:

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