Let a = [1, 1, 0], b = [3, 2, 1], and c = [1, 0, 2].
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Let a = [1, 1, 0], b = [3, 2, 1], and c = [1, 0, 2]. Find the angle between:
Find the angles of the triangle with vertices A: (0, 0, 2), B: (3, 0, 2), and C: (1, 1, 1). Sketch the triangle.
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