Pappus Theorem : If the vertices of a hexagon lie alternately on two lines, then the three intersections of the pairs of opposite sides are collinear.是什么意思_Pappus Theorem : If the vertices of a hexagon lie alternately on two lines, then the three intersections of the pairs of opposite sides are collinear.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句