The Decagons ClipArt gallery offers 13 illustrations of geometric shapes that are composed of 10 sides, and usually refers to regular decagons, where all sides are equal and all angles are equal to 144 degrees.

A 5-point star made from a non-regular concave decagon in which all sides are equal in length.

Illustration of an irregular convex decagon. This polygon has some symmetry.

Illustration of an irregular convex decagon. This polygon has some symmetry.

Illustration of an irregular convex decagon. This polygon has some symmetry.

Illustration of an irregular convex decagon. This polygon has some symmetry.

Illustration of an irregular convex decagon. This polygon has some symmetry.

Illustration of an irregular concave octagon. This polygon has some symmetry.