brianchon's theorem

line diagram font drawing circle sketch cartoon monochrome map iron brand wheel wing artwork text brianchon#39aph39#s theorem vector isolated white background charles julien brianchon white conic hexagon intersection geometry affine plane scaling analytical center central collineation centroid circle circumscriptible contact points diagonals education equations graphical infinity learning line mathematics methods vertices sides pairs parallel planimetry point position projective point view radical axis real projective reciprocation relationship science shape steiner inellipse study tangents theorem three transformed trilinear university vertex parabola hyperbola ellipse