Let S be the triangle with vertices A = (2, 2, 2), B = (4, 2, 1), and C = (2, 3, 1). (a)
Chapter 12, Problem 12.4.28(choose chapter or problem)
Let S be the triangle with vertices A = (2, 2, 2), B = (4, 2, 1), and C = (2, 3, 1). (a) Find the length of the shortest side of S. (b) Find the cosine of the angle BAC at vertex A.
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