7．如图5点def分别是abbcca边的中点则图中的平行四边形一共有 3个 d4个——青夏教育精英家教�—— Sketch Coloring Page

7．如图5点def分别是abbcca边的中点则图中的平行四边形一共有 3个 d4个——青夏教育精英家教�—— Template

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tomski7．如图5点def分别是abbcca边的中点则图中的平行四边形一共有 3个 d4个——青夏教育精英家教�—— coloring

7．如图5点DEF分别是ABBCCA边的中点则图中的平行四边形一共有 3个 D4个——青夏教育精英家教�—— sketch template

【问题情境�（1）如图1，正方形ABCD中，E、F分别是边AB和对角线AC上的点，∠EDF=45°．易证 DBE∽ DCF（不需写出证明过程 sketch template

小明遇到一个问题如图1正方形ABCD中EFGH分别是ABBCCD和DA边上靠�ABCD的n等分点连接AFBGCH sketch template

平面几何定理及证明（1）知乎 sketch template

7．如图5点DEF分别是ABBCCA边的中点则图中的平行四边形一共有 3个 D4个——青夏教育精英家教�—— sketch template

如图1DEF分别是 ABC三边ABBC和AC上的点若∠1=∠2∠3=∠4∠5=∠6�们称 DEF为 ABC的反射三角形．1 sketch template

如图在正方形ABCD中点EF分别是ADBC中点连接EF将矩形CDEF绕着点C逆时针旋转一定角度得到矩形CD′E′F′点E′恰好落 sketch template

题目如图AB=4cmAC=BD=3cm．∠CAB=∠DBA=60°点P在线段AB上以1cm/s的速度由点A�点B运动同时点Q在线 sketch template

题目如图已知正方形ABCD的边长为6EF分别是ABBC边上的点且∠EDF=45°将 DAE绕点D逆时针旋转90°得到 DCM sketch template

问题情境如图�在 ABD与 CAE中BD=AE∠DBA=∠EACAB=AC易证 ABD≌ CAE．特例探究如图�在等边 sketch template

在正方形ABCD中动点EF分别从DC两点同时出�以相同的速度在直线DCCB上移动．1如图�当点E自D�C点F自C�B移动时 sketch template

问题背景：“半角模型”问题．如图1，在四边形ABCD中，AB=AD，∠BAD=120°，∠B=∠ADC=90°，点E，F分别是BC，CD上的点 sketch template

【方法引领�如图1，点E、F分别是正方形ABCD的BC、CD边上的动点，连接AE、AF和EF，∠EAF=45°．若BE=2，DF=3，求EF的 sketch template

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如图已知 ABC中AB=AC∠BAC=90°点D为BC的中点点EF分别在直线ABAC上运动且始终保持AE=CF．1如图� sketch template

如图1，D、E、F分别是 ABC各边上的点，四边形ADEF是平行四边形，有三个选项：�D是AB的中点，�E是BC的中点，�F是AC的中点． sketch template

如图AD是 ABC的中线AB=AEAC=AF∠BAE=∠FAC=90°．判断线段AD与EF数量和位置关系．题目和参考答案——青夏教育 sketch template

如图在Rt ABC中∠BAC=90°AB=AC分别过点BC坐过点A的直线的垂线BDCE若BD=4CE=3则DE=A1B sketch template

如图在 ABC中∠ACB=α将 ABC绕着点A逆时针旋转2β后得 AED其中点ED分别和点BC对应联结CD如果CD⊥ED请 sketch template

�假突破：平行四边形问题的五大类型方法小结每日头条 sketch template

如图四边形ABCD是长方形长AD等于7厘米宽AB等于5厘米四边形CDEF是平行四边形．如果BH的长是3厘米那么图中阴影部分面积是多� sketch template

如图 E是长方形ABCD边AD的中点 AD=2AB=2 A B 求ΔBCE的面积和�长 ——青夏教育精英家教�—— sketch template

如图点EF分别是菱形ABCD的边BCCD上的点且 ∠EAF=∠D=60°∠FAD=45°则∠CFE= A60B45C sketch template

如图已知长方体ABCD A1B1C1D1中AB=BC=2AA1=1点EF分别是A1B1B1C1的中点点O是AB与BD的交点．1 sketch template

20．如图点DEF分别在ABBCAC上且DE∥ACEF∥AB下面写出了说明“∠A ∠B ∠C＝180° 的过程请填空因为 sketch template

如图所示的是利用平面直角坐标系画出的故宫博物院的主要建�分布图若这个坐标系分别以正东正北方�为x轴y轴的正方�且表示保和殿的点的坐标为 sketch template

题目1如图1在四边形ABCD中FE分别是BCAD的中点连结EF并延长分别与BACD的延长线交于点MN则∠BME=∠ sketch template

如图点DE分别在ACAB上． 1 已知BD=CECD=BE求证AB=AC 2 分别将“BD=CE 记为�“CD=BE sketch template

百度教育 sketch template

如图菱形ABCD中对角线ACBD相交于点O点E是AB的中点已知AC＝8cmBD＝6cm求OE的长——青夏教育精英家教�—— sketch template

如图点DE分别在 ABC的边上ABAC上且若DE=3BC=6AB=8则AE的长为——青夏教育精英家教�—— sketch template

如图点EF分别是菱形ABCD的边BCCD上的点且 ∠EAF=∠D=60°∠FAD=45°则∠CFE= A60B45C sketch template

如图所示在四边形ABCD中EFGH分别是四边形ABCD各边的中点已知阴影部分的面积是10求四边形SRPQ的面积．题目和参考答案 sketch template

如图点ABC分别表示海平面上的三只船 ABC是等边三角形AB=60海里下列说法不正确的是A船A在B的北偏东30°方�到B的距离 sketch template

如图在平行四边形ABCD中AB=6BC=4∠B=60°点E是边AB上的一点点F是边CD上一点将平行四边形ABCD沿EF折叠得到 sketch template

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