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 wrote "Do not hold everything gold that shines like gold" in 1175. Chaucer gave two early versions in English: ""But al thyng which that shyneth as the gold / Nis nat gold, as that I have herd it told"" in "The Canon's Yeoman's Tale", and ""Hyt is not al golde that glareth"" in "The House of Fame". The popular form of the expression is a derivative of a line in William Shakespeare's play "The Merchant of Venice", which employs the word "glisters," a 17th-century synonym for "glitters." The line comes from a secondary plot of the play, the puzzle of