Definition: Decagon

A decagon is a convex rectilinear figure with 10 sides and 10 vertices.

A decagon is called equilateral, if all of its sides are congruent. A decagon is called equiangular, if all of its angles are congruent.

Corollaries: 1
Proofs: 2 3 4 5
Propositions: 6 7

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