Incircle and excircles of a triangle polygon with any number of sides that has an inscribed circle—one that is tangent to each side—is called a tangential polygon. Incircle and excircles of a triangle 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
All that glitters is not gold Portia's boxes (Act II - Scene VII - Prince of Morocco): Panning for gold often results in finding pyrite, nicknamed fool's gold, which reflects substantially more light than authentic gold does. Gold in its raw form appears dull and lusterless. The original version of the saying used the word "glisters", but "glitters" long ago became the predominant form. Poet John Dryden used "glitter" in his 1687 poem "The Hind and the Panther". The words "glister" and "glitter" have the same meaning. In pop culture, this phrase shows up in Bob Marley's "Get Up, Stand Up". It is also used as