| Down |
| 1. | A polygon with congruent sides and angles |
| 3. | Angles in the same plane that have a common vertex and a common side |
| 5. | A figure formed by two rays with a common endpoint called the vertex |
| 6. | Two angles whose measures add to 90 |
| 7. | A figure has this if one half is a mirror-image of the other half |
| 8. | Two angles whose measures have a sum of 180 |
| 9. | A line that a figure is flipped across to create a mirror image of the original figure |
| 12. | Lines that intersect to form right angles |
| 13. | A triangle with all angles measuring less than 90 |
| 15. | A transformation of a figure that flips the figure across a line |
| 18. | A pair of opposite congruent angles formed by intersecting lines |
| 19. | On an angle or polygon, the point where two sides intersect |
| 21. | Lines in a plane that do not intersect |
| 22. | A quadrilateral with two pairs of parallel sides |
| 23. | A movement (slide) of a figure along a straight line |
| 24. | A change in the size or position of a figure |
| 25. | A four-sided polygon |
| 27. | An angle that measures 180 |
| 28. | A closed plane figure formed by three or more line segments that intersect only at their endpoints |
| 30. | A part of a line that starts at one endpoint and extends forever |
| 31. | A parallelogram with four right angles |