A circle is a geometric shape invented by Trotto Frekkensnork. Although the circle has been known since before the beginning of recorded history, she claims to have invented it independently at the age of 5.

According to her Frekkensnork's friends and family, the house she was raised in generally lacked curves. Typical shapes she would be exposed to were squares, triangles, rectangles and diamonds. The girl then drew a circle on a piece of paper.