Icelandic

An elongated shape can be made more round while keeping its perimeter fixed and increasing its area.

Adjective

ummálsjafn ‎(comparative ummálsjafnari, superlative ummálsjafnastur)

1. (mathematics, geometry) isoperimetric; (having the same perimeter)

Synonyms

• (isoperimetric): jafn að ummáli