<Li> Draw a line through D and E . </Li> <Li> This line meets the circle at two points, F and G . </Li> <Li> The tangents are the lines PF and PG . </Li> <P> A tangential polygon is a polygon each of whose sides is tangent to a particular circle, called its incircle . Every triangle is a tangential polygon, as is every regular polygon of any number of sides; in addition, for every number of polygon sides there are an infinite number of non-congruent tangential polygons . </P>

Radius 3 tangent to x 3 and y 4 and below and to the left of these lines