Superior Edge (upper edge of the triangular or wing-shaped portion of the pterygium)

Inferior Edge (lower edge of the triangular or wing-shaped portion of the pterygium).

After the Liturgy, a triangular portion is cut from the prosphoron by the refectorian (monk in charge of the refectory).

The area of the circular segment is equal to the area of the circular sector minus the area of the triangular portion.

An original circular driveway leads into a triangular, uncleared northern portion of the property where the buildings are located.

A gable is the generally triangular portion of a wall between the edges of a sloping roof.

A basic guidon can be rectangular, but sometimes has a triangular portion removed from the fly (known as "swallow-tailed")

A triangular portion of land originally conceived as a formal garden centred upon a mature Moreton Bay Fig tree.

A triangular portion of the neighborhood bounded by Beargrass Creek was not developed at all before the Civil War.

It was more than half burnt, a triangular portion with the stamp in one corner only remaining.