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
A-line (clothing) of flared skirt styles. "True" A-line shapes on the pattern of Dior and Saint Laurent saw a revival in the early 2000s. The A-line skirt has no visible embellishments for ease, such as pleats or slits, but is fitted to the upper hip by means of seams and/or darts. However, denim A-line skirts often have buttons down the center seam. Its fastening is usually kept discreet, with a side or back zipper. A belt is sometimes used. Pockets may be present, but not usually. It can be cut at any length. When referring to dresses and coats, the term "A-line"