Show that the points (1, 1, 1), (1,2,3), and (2,-1,1) are the vertices of an isosceles triangle.
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Question:
Show that the points (1, 1, 1), (1,2,3), and (2,-1,1) are the vertices of an isosceles triangle. Find the value of the two equal angles and round your answer to the nearest degree
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