1. It is the common endpoint.
2. This is represented by flat surface.
3. These are the points that are lie on the same line.
4. These are statements that are proven to be true using definitions, axioms/
postulates and derived using reasoning.
5. It is a ray that divides an angle into two congruent angles.
6. It is a subset of a line with one endpoint and extends in one direction endlessly.
a
a
7. It has infinite length but has no thickness and no width.
a
8. If three sides of one triangle are congruent to three sides of a second triangle
then the two triangles are congruent.
9. If the leg of one right triangle are congruent respectively to the legs of another
triangle then the right triangles are congruent.
10. If a leg of an acute angle of one right triangle are congruent respectively to leg
and an acute angle of another right triangle then the right triangles are congruent.
11. It is a point on line segment that divides it into two equal parts.
12. These are statements that are proven to be true without proofs.​