已知二点坐标求第三点坐标已知原始坐标:A:72.63,130.72B:614.9,129.37C:72.63,438.89偏移后坐标为A:74.47,128.32B:616.78,130.34要求偏移后c点坐标为何!

　　已知二点坐标求第三点坐标

　　已知原始坐标:

　　A:72.63,130.72

　　B:614.9,129.37

　　C:72.63,438.89

　　偏移后坐标为

　　A:74.47,128.32

　　B:616.78,130.34

　　要求偏移后c点坐标为何!