A pentagon is a convex rectilinear figure with 5 sides and 5 vertices.
A pentagon is called
The following figure shows an equilateral and equiangular pentagon (above) as well as a general pentagon (below).
Corollaries: 1 2
Definitions: 3
Lemmas: 4
Problems: 5
Proofs: 6 7 8 9 10 11 12 13 14 15 16 17 18
Propositions: 19 20 21 22 23 24 25 26 27 28