物件的鏡射

觀察點，圓，拋物線，橢圓，雙曲線分別對過原點的直線鏡射

Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now)

藍邦偉 老師, 製作軟體： GeoGebra