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
Adventures in a City that does not Exist Adventures in a City that does not Exist Adventures in a City that does not Exist () is a 1974 Soviet children's musical film, directorial debut of Leonid Nechayev. Pioneer Slava Kurochkin dreams of space. He actively studies physics and astronomy, but at the same time he does not read fiction at all. By coincidence, he finds himself in a fairytale town, where the heroes of the most famous books live: "The Snow Queen", "Timur and His Squad", "The White Solitary Sails", "Les Misérables", "Treasure Island" and so on. But, alas, in the city live not only positive characters -