geometry

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Given a line l, let A be a point on l, and B another point not on l.
a. prove all the points of the line segment AB, except for A lie on the same side as B.

  • geometry -

    two lines can intersect in at most one point.

    So, if there is a point P on AB on the opposite side from B, then PB intersects line l in some point besides A.

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