第二章: 相交線,平行線

                       一、相交線、垂線

練習十二                                                                練習十三

練習十四                                                                練習十五

練習十六                                                               單元練習(三)

                                二、平行線             

練習十七                                                               練習十八

練習十九                                                               練習二十

練習二十一                                                       練習二十二

練習二十三                                                           單元練習(四)

                                                      三、命題、定理、證明             

                練習二十四                                                           練習二十五

      練習二十六                                                            練習二十七

        單元練習(五)                                                    綜合練習