? Which statement is not one of the axioms of Euclidean
geometry?
O
If two points lie in space, there is only one line that can
pass through them.
If three points lie on the same line, there is only one
plane that can pass through them.
If two points lie on a plane, the line containing them also
lies on the plane.
If two planes intersect, their intersection is a line.

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.