Find the angle ABC of triangle ABC for A(3, 0, 1), B(3, 1, 2), and C(2, 1, 1). Hint: To

Chapter 12, Problem 18

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Find the angle ABC of triangle ABC for A(3, 0, 1), B(3, 1, 2), and C(2, 1, 1). Hint: To find the angle at B, use !BA and !BC. What angle is found if !BA and !CB are used?

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