Circles can be found inside and outside of triangles. Inscribe circles are located inside the triangle; the circles should touch each side of the triangle at a single point. Circumscribed circles are on the outside of the triangle; they touch each vertex of the triangle. The center of an inscribed circle is called the incenter and the center of a circumscribed circle is called the circumcenter. Circles can be located inside and outside the triangle, that is the relationship between triangles and circles.
Circles can be found in triangles. They can be found inside as well as outside triangles. The circles located on the inside are called inscribed circles. Inscribed circles should touch each side of the triangle at a single point. The circles on the out sides are called circumscribed circles. A circumscribed circle touches each vertex of the triangle. There are also things called the incenter and the circumcenter. The incenter is the center of the inscribed circle and the circumcenter is the center of a circumscribed circle. The relation between a circle and a triangle is that circles can be located inside and outside a triangle.