Constructive Geometry of Plane Curves: With Numerous Examples

angle asymptotes axis base bisects the angle called centre circle coincides cone conic conjugate diameters constant construction corresponding course curve cutting describe determined diameter direction directrix distance divided draw drawn ellipse equal evidently extremities figure Find fixed foci focus focus F follows formed four given Fig given lines given point given tangent harmonic Hence intersection involution known length locus major axis mean proportional meeting method opposite sides pair parabola parallel pass pencil perpendicular plane point of contact polar pole position Prob PROBLEM produced Proof Prop radius range ratio reduces respectively right angle second focus segments shew shewn sides similar Similarly solutions straight line Take taken tangent touch triangle vertex vertices