Chapter Vi - Poles and Polars

95. Inscribed and circumscribed quadrilaterals 96. Definition of the polar line of a point 97. Further defining properties 98. Definition of the pole of a line 99. Fundamental theorem of poles and polars 100. Conjugate points and lines 101. Construction of the polar line of a given point 102. Self-polar triangle 103. Pole and polar projectively related 104. Duality 105. Self-dual theorems 106. Other correspondences PROBLEMS