如图四边形abcd是平行四边形．o是对角线ac的中点过点o的直线ef分别交abdc于点ef与cbad的延长线分别交于点gh Sketch Coloring Page

如图四边形abcd是平行四边形．o是对角线ac的中点过点o的直线ef分别交abdc于点ef与cbad的延长线分别交于点gh Template

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tomski如图四边形abcd是平行四边形．o是对角线ac的中点过点o的直线ef分别交abdc于点ef与cbad的延长线分别交于点gh coloring

平行四边形的定义和性质 Word文档在线阅读与下载免费文档 sketch template

如图，在四边形ABCD中，对角线AC与BD交于点O，已知OA =OC，OB=OD，过点O作EF⊥ BD，分别交AB、DC于点E，F，连接DE sketch template

平行四边形性质与判定测试题 Word文档在线阅读与下载无忧文档 sketch template

题目如图四边形ABCD是平行四边形EF是对角线BD上的点∠1=∠2． 1求证BE=DF2求证AF∥CE．题目和参考 sketch template

人教版初中数学八年级下册平行四边形的对角线互相平分公开课优质课课件教案视� 知乎 sketch template

平行四边形知识�络文档之家 sketch template

平行四边形的应用平行四边形的应用图片三角形的应用大山谷图库 sketch template

4．如图已知四边形ABCD是平行四边形点P是平面 ABCD外的一点则在四棱锥P ABCD中M是PC 的中点在DM上取一点G过G和 sketch template

如图在平行四边形ABCD中O是AC与BC的交点过O点的直线EF与ABCD的延长线分别交于E，F 百度知道 sketch template

如图四边形EFGH的面积是66平方米．EA=ABCB=BFDC=CGHD=DA．求四边形ABCD的面积．题目和参考答案——青夏教育 sketch template

如图所示在平行四边形ABCD中EF分别是ABCD上的点且AE=CF连接BFDE试猜测∠ADE与∠CBF的大小关系并加以证明 sketch template

将平行四边形纸片ABCD按如图方式折叠使点C与A重合点D落到D′处折痕为EF．1求证 ABE≌ AD′F2连接CF判断四边 sketch template

如图四边形ABCD是平行四边形对角线ACBD交于点O过点O画直线EF分别交ADBC于点EF求证OE＝OF——青夏教育精英家教�—— sketch template

定义：有一组对角互补的凸四边形叫做“对补四边形”【概念理解�1在以下三种图形中：�平行四边形，�正方形，�长方形，一定是“对补四边形”的 sketch template

如图四边形ABCD中对角线相交于点OEFGH分别是ABBDBCAC的中点．求证四边形EFGH是平行四边形．题目和参考答案 sketch template

如图四边形ABCD是平行四边形BEEC=12F是DC的中点三角形ABE的面积是12cm2那么三角形ADF的面积是1818cm2 sketch template

特殊平行四边形测试题 Word文档在线阅读与下载无忧文档 sketch template

如图四边形ABCD是平行四边形E是AD的中点F在AB上三角形AEF面积为4平方厘米三角形CDE的面积为10平方厘米求三角形CEF的 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

已知如图在平行四边形ABCD中点MN在对角线AC上且AM=CN．求证四边形BMDN是平行四边形．题目和参考答案——青夏教育精英家教�—— sketch template

平行四边形ABCD的对角线交于点OS AOB=2cm则SABCD= ．题目和参考答案——青夏教育精英家教�—— sketch template

如图所示的图形中 是四边形 是平行四边形．题目和参考答案——青夏教育精英家教�—— sketch template

已知如图四边形ABCD是平行四边形且∠1＝∠2 试说明 CEF的哪两边之和恰好等于 ABCD的�长并简述理由——青夏教育精英家教�—— sketch template

如图已知四边形ABCD是平行四边形DE⊥ABDF⊥BC垂足分别是EF且DE=DF．1求证 ADE≌ CDF2判断四边形 sketch template

如图2四边形ABCD中AB∥CD要使四边形ABCD为平行四边形则可添加的条件为 ——青夏教育精英家教�—— sketch template

如图所示四边形EFGH为空间四边形ABCD的一个截面若截面为平行四边形 1求证AB∥平面EFGHCD∥平面EFGH 2若 sketch template

如图四边形ABCD是平行四边形．1请用直尺和圆规按下列步骤作图保留作图痕迹�作∠BAD的平分线交CD于E交BC的延长线于F� sketch template

在平行四边形ABCD中若∠A ∠C=210°则∠B= ．题目和参考答案——青夏教育精英家教�—— sketch template

如图E是平行四边形ABCD边CD的中点AC和BE相交于F如果三角形EFC的面积是1平方厘米则平行四边形ABCD的面积是1212平方厘米 sketch template

如图，在菱形ABCD中，AB=AC=10，对角线AC、BD相交于点O，点M在线段AC上，且AM=3，点P为线段BD上的一个动点，则MP sketch template

如图四边形ABCD为平行四边形∠BAD的角平分线AF交CD于点E交BC的延长线于点F．1求证BF=CD2连接BE若BE⊥ sketch template

如图四边形ABCD和A′B′C′D′是以点O为位似中心的位似图形若OAOA′=23则四边形ABCD与四边形A′B′C′D′的面积比为 sketch template

如图1已知四边形ABCD是正方形对角线ACBD相交于点E以点E为顶点作正方形EFGH．1如图1点AD分别在EH和EF上连接 sketch template

如图，平行四边形abcd的�长是75厘米，AE=14厘米，af=16厘米，求平行四边形abcd的面积 3D溜溜� sketch template

如图四边形ABCD内接于⊙OAB是⊙O的直径AC和BD相交于点E且1求证BC=CD2分别延长ABDC交于点P过点A作 sketch template

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