Across
- 4. ≅
- 6. when 2 lines intersect that are opposite to each other
- 9. 2 angles that have a sum of 90°
- 11. ∟
- 14. ⊥
- 15. 2 angles that have a sum of 180°
Down
- 1. If AB ≅ CD then CD ≅ AB
- 2. to flip an object to across a line
- 3. ∠
- 5. 90° rotation counterclockwise,180° rotation 270°
- 7. two types: rotational and line
- 8. lines line that lie on the same lie and never cross
- 10. three sides with equal length
- 12. Two angles and the side between them are congruent
- 13. center of the triangles intersection points