Tools of Geometry

3. a point at the end of a segment or starting point of a ray.
5. a statement that is believed to be true.
6. a change in the position, size, or shape of a figure or graph.
7. lines in the same plane that do not intersect.
12. a statement that can be written in the form if p, then q. where p is the hypothesis and q is the conclusion.
14. a line, ray, or segment that divides a segment into two congruent segments.
15. a statement that has been proven.
17. one of the two rays that form an angle.
18. a statement that is accepted as true without proof. Also called an axiom.
19. a figure formed by two rays with the same endpoints.
20. an undefined term in geometry, a _______ is a straight path that has no thickness and extends forever.
21. an example that proves that a conjecture or statement is false.
22. a ray that divides an angle into two congruent angles.
23. an undefined term in geometry, it names a location and has no size.
24. the point that divides a segment into two congruent segments.
26. the original figure in a transformation.
27. a unit of angle measure; one degree is one three hundredth of a circle.

1. a shape that results from a transformation of a figure known as the preimage.
2. points that lie in the same plane.
4. the process of using logic to draw conclusions.
8. a part of a line consisting of two endpoints and all the points between them.
9. an undefined term in geometry, it is a flat surface that has no thickness and extends forever.
10. a pair of adjacent angles whose noncommon sides are opposite rays.
11. process of reasoning that a rule or statement is true because specific cases are true.
13. A transformation that changes the position of a figure without changing the size or shape of a figure. Also known as an isometry.
16. a part of a line that starts at an endpoint and extends forever in one direction.
21. points that lie on the same line.
25. the common endpoint of the sides of the angles.