长方形ABCD,?点E?点F?在边AB上,点A,?点B,?点E,?点F不重合,连接DE,连接CF,相较于点O,已知S△EOF = 4, S△COB = 16,求S?□ABCD = ?
Plane Geometry (Junior High School)-CSDN博客
Vertical Calculation-CSDN博客