1. Relation
2. Constant
3. Cylinder
4. Concave
5. Symmetry
6. Tangent
7. Inscribe
8. Rectangle
9. Secant
10. Cone
11. Area
12. Unit
13. Sphere
14. Hexagon
15. Converse
16. Postulate
17. Theorem
18. Parabolas (Pair a bellas)