Vocabulary words

3. an example showing a statement is false
10. A line,segment or Ray that is perpendicular to the segment at its midpoint
12. planes that do not intersect
13. a triangle thst has no congruent sides
15. a apair of adjacent angles whose non-common are opposite rays
16. a conclusion reached by using inductive reasoning
18. the statement obtained by reversing the hypothesis and conclusion of a conditional
19. a triangle that has at least two congruent sides

1. two coplanar angles with a common side,a common vertex,and no common interior points
2. two angles whose measures have a sum of 90 degrees
4. a triangle whose sides are all congruent
5. a line that intersects two or more coplanar lines at distinct points
6. coplanar lines that do not intersect
7. two angles whose measures have a sum of 180 degrees
8. two angles whose sides are opposite rays
9. angles that lie on the same side of the transversal and in corresponding positions
11. non-coplanar they are not parallel and do not intersect
12. two lines that intersect to form right angles
14. a conjecture that is proven
17. an accepted statement of fact