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( 7分)如圖，AB∥CD，分別寫(xiě)出下面四個(gè)圖形中∠A與∠P、∠C的關(guān)系，請(qǐng)你從所得到的關(guān)系中任選一圖的結(jié)論說(shuō)明理由。

⑴                                   ⑵                                                            

⑶                                    ⑷                           

( 7分)如圖，AB∥CD，分別寫(xiě)出下面四個(gè)圖形中∠A與∠P、∠C的關(guān)系，請(qǐng)你從所得到的關(guān)系中任選一圖的結(jié)論說(shuō)明理由。

⑴                                    ⑵                                                            

⑶                                    ⑷                           

( 7分)如圖，AB∥CD，分別寫(xiě)出下面四個(gè)圖形中∠A與∠P、∠C的關(guān)系，請(qǐng)你從所得到的關(guān)系中任選一圖的結(jié)論說(shuō)明理由。

⑴                                   ⑵                                                           
⑶                                   ⑷                          

(6分)如圖，AB∥CD，CE平分∠ACD，若∠1=25°，求∠2的度數(shù)。