Which regular polygon is divided into equilateral triangles when all of the radii are drawn in the picture? (Check out your notes...you may figure it out...This is the reason that the side of this pol

Which regular polygon is divided into equilateral triangles when all of the radii are drawn in the picture? (Check out your notes...you may figure it out...This is the reason that the side of this polygon can be used as the length of the radius....) A) triangle B) pentagon C) hexagon D) octagon E) None of the above