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References to 'pentagon'
1. antiprism by Wkbj79
2. circumscribe by PrimeFan
3. classification of Platonic solids by mps
4. compass and straightedge construction of regular pentagon by Wkbj79
5. constructible angles with integer values in degrees by PrimeFan
6. construction of regular $2n$-gon from regular $n$-gon by Wkbj79
7. cycle by mps
8. inscribe by PrimeFan
9. length by PrimeFan
10. Moore graph by Mathprof
11. pentagram by pahio
12. polygon by Mathprof
13. polygon by Wkbj79
14. radian by PrimeFan
15. Ramsey numbers by wdsmith
16. regular polygon by Wkbj79
17. regular polygon and circles by pahio
18. regular polyhedron by mathwizard