111 i 





a given circle, whose * - at the point 0, 



. 



159 

 tfai 



IfelM 



i., :,' 



Let A A, I* the polar of P p with regard to the given 



-, and 1 "/'... A The relation of LL V 



+ #&****. . . (8) 



lati.'i^ (2) and (8) sho A/ M and OP l 



ire perpendicular to ra<-h otln : the line the 



fipeii point P l to the ceti \e circle i$ perpendicular to 



SlU polar of P l u > th*' d, 



distance (OK) from : to the line LL l 



) is 



(4) 



and tin- lrn-th ..t Ol\ ( Art. I 



th.'IVlMlT OP l 



llonce, to construct, with regard to a given circle, the 



nit /',. j.'in that jx)int to the 



tli.- ion on OP l (pHMlin-fd if neivssarv ) lind a jniint 



.cii that the rectangle OP l OK is equal to the square 



