noun, verb ·Rare ·Advanced level

Definitions

Noun

1. 1
   A circle within a polygon, especially a triangle, that is tangent to each side.

   "To construct the incircle of ΔABC, we need the center of the circle and a pass-through point."

Verb

1. 1
   Archaic form of encircle. alt-of, archaic

Synonyms

All synonyms

inscribed circleinscribed circle

Example

More examples

"Find the radius of the incircle of the triangle."

Etymology

From in- + circle.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.