Geometry Vocabulary

4. lines that do not intersect are said to be ___
7. a part of a line with one endpoint that extends indefinitely in one direction
10. used to prove a conjecture false by providing an example of when it fails
12. two angles with a sum of 90 degrees
13. a location in space with no size
14. describes an angle with a measure less than 90 degrees
15. the property in which a value is always equal to itself
16. a statement that can be easily proven using a theorem
19. the ratio of change in values along the y-axis compared to values along the x-axis
20. a triangle with at least two congruent sides

1. describes a triangle with no congruent sides
2. two angles with a sum of 180 degrees
3. a logical argument in which each statement is supported by a statement which is true
5. a point that divides a line segment into two congruent pieces
6. having equal sides
8. an accepted statement of fact
9. the property which states if a=b and b=c then a=c
11. points that lie on the same line are said to be ___
17. a transformation that "flips" a figure over a point, line, or plane
18. describes an angle with a measure greater than 90 degrees