Geometry Vocabulary

5. Figures that have the same shape but can differ in size that have proportional corresponding side lengths
8. A rigid motion that "flips" a figure over a specific line without changing its size and shape
9. The total distance around the outside edge of a 2 dimensional figure
11. A polygon of 6 sides
12. A polygon of 5 sides
14. A rigid motion that "turns" a figure around a specific point without changing its size and shape
16. A special triangle with 3 equal sides and 3 equal angles
18. Two lines that intersect at a 90° angle (⊥)
19. A polygon of 4 sides
20. A polygon of 9 sides
21. A transformation that changes the size of a figure, but not its shape or angles

1. Two angles that add up to 180°
2. Two angles that add up to 90°
3. To divide something into 2 equal halves
4. A polygon of 3 sides
6. A rigid motion that "slides" a figure to a new location without changing its size and shape by moving every point the same direction and same distance
7. The total space inside a 2 dimensional figure
9. Two lines that are always distance apart and never intersect (||)
10. Equal in shape and size (≅)
13. A polygon of 10 sides
15. A special triangle with 2 equal sides and 2 equal angles
17. A polygon of 8 sides