（8分）如圖，E、F是□ABCD對角線
上的兩點，且
.
求證：（1）
；
（2）
.
證明：（1）
四邊形
是平行四邊形，
.
.················································································· 2分
，
.
.·················································································· 3分
········································································ 4分
(2)由得
.，·········································································· 5分
四邊形
是平行四邊形. ·································································· 7分. 8分
解析
名校練考卷期末沖刺卷系列答案科目：初中數(shù)學(xué) 來源： 題型：
查看答案和解析>>
國際學(xué)校優(yōu)選 - 練習(xí)冊列表 - 試題列表
湖北省互聯(lián)網(wǎng)違法和不良信息舉報平臺 | 網(wǎng)上有害信息舉報專區(qū) | 電信詐騙舉報專區(qū) | 涉歷史虛無主義有害信息舉報專區(qū) | 涉企侵權(quán)舉報專區(qū)
違法和不良信息舉報電話：027-86699610 舉報郵箱：58377363@163.com
20、已知：如圖，E、F是AB上的兩點，AE=BF，AC∥BD，∠C=∠D．求證：CF=DE．
（2013•榮昌縣模擬）如圖，⊙O的直徑是AB，∠C=35°，則∠DAB的度數(shù)是（ �。�