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Let three vertices of a triangle be A(4, -3, 1), B(0, 1, -5), and C(1, 5, -3). a. Write the equations of lines AB, AC,

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Let three vertices of a triangle be A(4, -3, 1), B(0, 1, -5), and C(1, 5, -3). a. Write the equations of lines AB, AC, and BC. b. Is this a right triangle? How do you know? c. What is the area of the triangle? d. What is the formula of the plane that contains these points

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