The inscribed circle, or incircle, of a polygon is the circle that is drawn inside the polygon such that it is tangent to all the sides of the polygon. In this case, the polygon is said to be a tangential polygon. The incircle is also the largest circle contained in the polygon that touches each side in just one place. All triangles and regular polygons have inscribed circles. In the case of triangles, the center of the incircle is the incenter, which is the point where the angle bisectors meet. In the case of regular polygons, the center of the incircle is the circumcenter, which is the point where the perpendicular bisectors of the sides meet. Conversely, when the polygon is irregular, it is unlikely to have an inscribed circle, except in the case of triangles. However, it is still possible for some irregular polygons to have an inscribed circle.