1. You
can only draw one line between two points. You will not be able to draw
a second line through points A and B:

2.
There's
360° around a circle.

3. Two
lines can instersect at ONLY one point. S is the only intersection of
and
in the figure below.

4. A line
segment has ONLY one midpoint. M is the only Midpoint of
in the figure below.

5. An angle
can only have one bisector. (Bisector: a ray that's in the interior
of an angle and forms two equal angles with the sides of that angle.)

In the
figure below,
is the bisector of A

6. Any
geometric shape can be moved without changing its shape.

7. A line
segment will always be the shortest distance between two points on a
plane. The curved line and the bropken line segments are further in
distance between A and B.

8. If two
points lie in a plane, the line containing the points lie in the plane.

9. When
two planes intersect, their intersection is a line.

10. ALL
lines and planes are sets of points.

11. Every
line has a coordinate system. (The Ruler Postulate)

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