Let s be the triangle with vertices a 2 2 2 b 4 2 1 and c


Question: 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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Mathematics: Let s be the triangle with vertices a 2 2 2 b 4 2 1 and c
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