A

Determiner

 recta  sería

Auxiliary

  o

Determiner

  caso

Noun

  límite

Noun

  dun

  círculo

⭕

Noun

  de

Adposition

  raio

Noun

  de

Adposition

  curvatura

Noun

 infinito.

The straight would be the boundary case of a circle of infinite curvature radius.

The straight would be the boundary case of a circle of infinite curvature radius.