An observer
An observer standing west of the tower sees its top at an altitude angle of 45 degrees. After moving 50 meters to the south, he sees its top at an altitude angle of 30 degrees. How tall is the tower?
Correct answer:
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You need to know the following knowledge to solve this word math problem:
- geometry
- similarity of triangles
- algebra
- expression of a variable from the formula
- arithmetic
- square root
- planimetrics
- Pythagorean theorem
- right triangle
- triangle
- numbers
- fractions
- goniometry and trigonometry
- tangent
Units of physical quantities:
Grade of the word problem:
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