An elementary treatise on modern pure geometry (1893)
Lachlan, Robert · London, New York, Macmillan and Co. · leaf 294
. 277 … But, {AA, RO} = {AA, OR}. Therefore P {AA, BC} = P {AA, EC}, and therefore the pencil P {AA, BB, CC} ia in involution. Ex. 6. If any straight line drawn through a fixed point 0 on a circle, cutthe sides of an inscribed triangle ABC in the points A, B, C, and the circlein the point P, show that the…
Geometry
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