Geometry Vocabulary

3. angles pair of non-adjacent angles sharing only a vertex
4. symmetry in which a rotation of less than 360° can map the shape onto itself
6. a pair of angles that are formed by two line and a transversal and that are inside the two lines and on opposite sides of the transversal
10. a transformation in which each point of the pre-image travels clockwise or counterclockwise around a fixed point a certain number of degrees
12. a transformation that preserves size and shape
13. a line that intersects two or more coplanar lines in different points
15. to divide into two equal or congruent parts
17. part of a line bound by two endpoints
19. the resulting figure after a transformation
21. a pair of nonadjacent angles that are formed by two lines and a transversal such that the angles are on the same side of the transversal and one of the angles is outside the two lines while the other angle is between the two lines
22. a change in the position, size, or orientation of a figure
25. an actual or imaginary line that creates a mirror image

1. two angles whose measures have a sum of 180°
2. figures that intersect to form right angles
5. a pair of angles that are both adjacent and supplementary; the two angles form a line
7. coplanar lines that do not intersect
8. In a reflection, the central line about which a figure produces its mirror image.
9. figures in which one maps to the other by a composition of rigid motions; having the same measure
11. point, line, plane
14. original figure prior to a transformation
16. the point on a segment that divides it into two congruent segments
18. two angles whose measures have a sum of 90°
20. a transformation that moves each point of a figure the same distance and in the same direction
23. a transformation in which a figure is flipped over a line
24. union of two rays with a common endpoint