Unit 1 Vocabulary
by Renee Ulberg
1. Obtuse angle- an angle more then 90 degrees
2. Straight angle
3. Point- A location in space
4. Midpoint- A point that divides a segment into two congruent segments
5. Endpoint-End of a line
6. Vertex- the end of an angle
7. Ray-Part of a line consisting of one endpoint and all points of the side and the end point
8. Opposite rays- Two collinear rays with the same endpoint
9. Segment-Part of a line consisting two end points
10. Line-A set of points that extends in two directions without end
11. Collinear- points that are on the same line
12. Plane-A flat surface that extends in all directions without end
13. Coplanar-Points that are in the same plane
14. Parallel- doesn't touch at any point
15. Perpendicular- intersecting lines
16. Intersecting-touching at any point
17. Skew- doesn't touch but intersects
18. Bisector-A bisector is something that cuts an object into two equal parts
19. Congruent-the same or equal
20. Conjecture-an opinion or conclusion formed on the basis of incomplete information
21. Theorem- general proposition not self-evident but proved by a chain of reasoning
22. Angle- For by two rays
23. Acute angle- angle less then 90 degrees
24. Right angle- angle that is 90 degrees
