現在地と前後の項目 平行線と線分の比/相似図形を探す問題1/相似図形を探す問題2/相似図形を作る問題/相似図形と辺の比/相似,平行線と比/中点連結定理1/中点連結定理2/問題以上,答以下/入試問題1/入試問題2/入試問題3/入試問題4/証明の進め方5/角の二等分線と補助線/面積比/メネラウスの定理,チェバの定理/ ![]() 次の平行四辺形ABCDにおいて,EはADの中点,FはBDとCEの交点とします.このとき,EF:FCの比を求めなさい.
次の正六角形ABCDEFにおいて,GはACとBFの交点とします.このとき,AG:GCの比を求めなさい.
《問題3》
《問題4》
《問題5》
次の台形ABCDにおいて対角線AC,BDの交点を通りADに平行な線分がAB,CDと交わる点をE,Fとします.このとき,EFの長さを求めなさい.
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