In geometry, a circle that touches one side of a triangle on the outside and the extensions of the other two sides.
From Latin 'ex-' (outside) + English 'circle,' describing a circle that lies outside the main triangle, contrasting with the 'incircle' that sits inside.
Every triangle has three excircles (one for each side)—they're like the triangle's protective bubbles on the outside! Architects and engineers use excircle properties when designing structures with specific angular relationships.
Complete word intelligence in one call. Free tier — 50 lookups/day.