Incircle and excircles of a triangle

（重定向自Excentre）

A triangle (black) with incircle (blue), incenter (I), excircles (orange), excenters (JA,JB,JC), internal angle bisectors (red) and external angle bisectors (green)

In geometry, the incircle or inscribed circle of a triangle is the largest circle contained in the triangle; it touches (is tangent to) the three sides. The center of the incircle is a triangle center called the triangle's incenter.

An excircle or escribed circle of the triangle is a circle lying outside the triangle, tangent to one of its sides and tangent to the extensions of the other two. Every triangle has three distinct excircles, each tangent to one of the triangle's sides.

单词	Excentre
释义	Excentre 英语百科 Incircle and excircles of a triangle （重定向自Excentre） In geometry, the incircle or inscribed circle of a triangle is the largest circle contained in the triangle; it touches (is tangent to) the three sides. The center of the incircle is a triangle center called the triangle's incenter. An excircle or escribed circle of the triangle is a circle lying outside the triangle, tangent to one of its sides and tangent to the extensions of the other two. Every triangle has three distinct excircles, each tangent to one of the triangle's sides.
随便看	report write control system的意思 report write logical record的意思 Report writer的意思 report writer control system的意思 report writer feature的意思 report writer logical record的意思 report year的意思 Repos的意思 Reposaari的意思 Reposado的意思 reposados的意思 reposal的意思 reposal的意思 reposamal的意思 reposan的意思 reposance的意思 Reposans的意思 re pose的意思 repose的意思 Repose angle的意思 repose at的意思 repose confidence in的意思 repose confidence in sb的意思 repo security的意思 repose的意思