60. Point-row of the second order defined 61. Tangent line 62. Determination of the locus 63. Restatement of the problem 64. Solution of the fundamental problem 65. Different constructions for the figure 66. Lines joining four points of the locus to a fifth 67. Restatement of the theorem 68. Further important theorem 69. Pascal’s theorem 70. Permutation of points in Pascal’s theorem 71. Harmonic points on a point-row of the second order 72. Determination of the locus 73. Circles and conics as point-rows of the second order 74. Conic through five points 75. Tangent to a conic 76. Inscribed quadrangle 77. Inscribed triangle 78. Degenerate conic PROBLEMS
An Elementary Course in Synthetic Projective Geometry · The Wunder Library — complete classics, free to read, with narration.