Calculate 82578
The vertices of triangle ABC are: A[1, 2, -3], B[0, 1, 2], C[2, 1, 1]. Calculate the lengths of sides AB, AC and the angle at vertex A.
Correct answer:
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You need to know the following knowledge to solve this word math problem:
- geometry
- analytic geometry
- arithmetic
- square root
- planimetrics
- Pythagorean theorem
- right triangle
- triangle
- The Law of Cosines
- goniometry and trigonometry
- cosine
- arccosine
Units of physical quantities:
Grade of the word problem:
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