Geometry Vocabulary

4. A line that splits an angle into two equal angles
5. a point on a line segment that divides it into two equal parts
7. points that lie on the same line
12. a line, ray, or segment which cuts another line segment into two equal parts
15. any of a set of straight lines passing through one point
17. the distance around a two dimensional shape
18. a set of values that show an exact position
19. a straight line at an angle of 90° to a given line, plane, or surface
20. two acute angles that add up to 90 degrees
21. a flat surface
23. the part of a line included between two points
25. identical in form; coinciding exactly when superimposed
26. two angles that share a common side and a common vertex but do not overlap
27. an angle whose measurement is greater than 90 degrees, but less then 180 degrees

1. two angles or arcs whose sum is equal to 180 degrees
2. an angle whose measurement is exactly 180 degrees
3. a line or a segment perpendicular to a segment that passes through the midpoint of the segment
6. points that lie in the same plane
8. an exact location in the space
9. an assumption used as a basis for mathematical reasoning
10. the extent or measurement of a surface or piece of land
11. a pair of non-adjacent angles formed from two lines
13. a point or line common to lines or surfaces that intersect
14. a shape formed by two lines or rays diverging from a common point
16. the length around any circle
22. a long, narrow mark or band
24. an angle whos measurement is less than 90 degrees