Question: 10. Prove that the three points (1. -1, 3), (2, 1, 7), and (4, 2, 6) are the vertices of a right triangle, and find

10. Prove that the three points (1. -1, 3), (2, 1,

10. Prove that the three points (1. -1, 3), (2, 1, 7), and (4, 2, 6) are the vertices of a right triangle, and find its area. 11. A line is drawn through the point (6, 4, 2) perpendicular to the yz plane. Find the coordinates of the points on this line at a distance of 10 units from the point (0, 4, 0). 12. Solve Exercise 11 if the line is drawn perpendicular to the xy plane

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