Given three points a,b,c on a line, and three points A,B,C on another line, then three intersection points of the follow pair (aA,Bb),(Ab,cC),(bB,Ca) are collinear.
Given three points a,b,c on a line, and three points A,B,C on another line, then three intersection points of the follow pair (aA,Bb),(Ab,cC),(bB,Ca) are collinear.