Point M, N, and P are collinear a. Point A does not lie on this straight line. Prove that points A, M, N

Point M, N, and P are collinear a. Point A does not lie on this straight line. Prove that points A, M, N and P are in the same plane.

Consider 3 points M, N, and A. According to the theorem, one and only one plane passes through 3 points, then these points belong to this plane. Line MN will also belong to this plane since 2 of its points (MN) belong. Point P belongs to the plane, since it belongs to the line MN by the problem statement.



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