Across
- 3. the angle formed by two adjacent sides of a polygon
- 6. are not adjacent to the exterior angle
- 7. 3 acute triangles
- 9. matching parts of the other polygon
- 10. turn;transformation around a fixed point called the center of rotation, through a specific angle, and in a specific direction
- 12. 3 congruent acute angles
- 14. uses statements written in boxes and arrows to show the logical progression of an argument
- 15. 1 right angle
- 17. extra line or segment drawn in a figure to help analyze geometric relationships
- 18. at least 2 congruent sides
- 19. use figures in the coordinate plane and algebra to prove geometric concepts
Down
- 1. all the parts of one polygon are congruent to the corresponding parts
- 2. 3 congruent sides
- 4. position of the image may differ from that of the preimage, but the two figures remain congruent
- 5. 1 obtuse angle
- 8. formed by one side of the triangle and the extension of an adjacent side
- 11. angles formed by the base and the congruent sides
- 13. side located between two consecutive angles of a polygon
- 16. flip; transformation over a line called the line of reflection
- 19. theorem with a proof that follows as a direct result of another theorem