ClipArt ETC
Illustration of an irregular convex polygon with 16 sides that has symmetry. It could be used to show rotation of a square.

Irregular Convex Polygon

Illustration of an irregular convex polygon with 16 sides that has symmetry. It could be used to show…

Illustration of a quadrilateral, a four-sided figure.

Quadrilateral

Illustration of a quadrilateral, a four-sided figure.