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
This is Not a Book This is Not a Book This is Not a Book is a book by Keri Smith that was published in 2009. It is not a normal book, because the book does not exist without the reader. The book is almost completely blank, so the reader creates the content and the final product. The book's purpose is to teach a reader to think creatively and take risks. The main question presented is: if it is not a book, then what exactly is it? The answer is left to the reader to determine. "This Is Not A Book" is much like Wreck