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abdc于点ef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abdc于点ef与cbad的延长线分别交于点gh Template

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sketch #4974 Eminem by Juan Garcia

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sketch #1490 James Joyce....

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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abdc于点ef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

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

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

有趣的小学数学知乎 sketch template

求平行四边形的对角线平行四边形对角线咋算平行四边形�量对角线 大山谷图库 sketch template

如图四边形ABCD是平行四边形点E在AD上请仅用无刻度直尺按要求作图保留作图痕迹不写作法1在图1中过点E作直线EF将四边形 sketch template

如图在平行四边形ABCD中EF过对角线的交点O，分别交ADBC与点EF，已知AB=4，BC=7，OE=3 百度知道 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

如图1在平行四边形ABCD中∠BAD的平分线交直线BC于E交直线DC于点F以CF为邻边作平行四边形ECFM．1求证四边形ECFM sketch template

如图EFGH分别是四边形ABCD四条边的中点则四边形EFGH一定是 A．平行四边形B．矩形C．菱形D．正方形题目和参考答案 sketch template

如图四边形ABCD中对角线相交于点OEFGH分别是ABBDBC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已知四边形ABCD是平行四边形．1作∠A的平分线交BC于点E．用尺规作图保留作图痕迹不用写作法中若AD=6EC=2求 sketch template

如图，已知四边形ABCD菱形，点E、F、G、H分别在菱形的四条边上，且AE=CG，AH=CF．（1）求证：四边形EFGH是平行四边形；（2）若 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ABCD的延长线分别交于E，F 百度知道 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

如图已知平行四边形ABCD的面积为12cm2CE=CDAE与BD的交点为F求图中阴影部分的面积题目和参考答案——青夏教育精英家教�—— 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

如图，四边形ABCD是平行四边形，对角线AC、BD相交于点O，点E、F分别在AB、AD上，AE=AF，连接EF，且AC⊥EF．（1）求证：四边 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平行四边形ABCD的对角线相交于点O直线EF经过点O分别与ABCD的延长线交于点EF．求证四边形AECF是平行四边形．题目和 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

如图F是平行四边形ABCD的边AD上一点CF交BA的延长线于点E若AFFD=23AB=4求AE的长．题目和参考答案——青夏教育精英 sketch template

如图在平行四边形ABCD中对角线ACBD的长度分别为10和6则AB长度的最大整数值是 A．8B．5C．6D．7——青夏教育精英家教�—— sketch template

21．如图在平行四边形ABCD中E为BC边上的点若BEEC＝45AE交BD于F则BFFD等于 A．45 B．35 C 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，在四棱锥P ABCD中，底面ABCD是平行四边形，∠BCD=120°，侧面PAB⊥底面ABCD，PB=2√6，AB=AC=PA=2√3 sketch template

如图平行四边形ABCD中M是BC的中点且AM=9BD=12AD=10则ABCD的面积是 A．30B．36C．54D．72 题目 sketch template

如图平行四边形ABCD中∠B=30°AB≠BC将 ABC沿AC翻折至 AB′C连结B′D．若AB=2$sqrt{3}$∠AB′D sketch template

如图，在四边形ABCD中，AB=AD，∠ BAD=∠ BCD=90^° ，连接AC，若AC=8，则四边形ABCD的面积为。百度教育 sketch template

如图空间四边形ABCD的各边及对角线长都是1点M在边AB上运动点Q在边CD上运动则PQ的最短距离为解析B 当MN分别为中点时 sketch template

百度教育 sketch template

如图点O是平行四边形ABCD的对角线的交点 AOB绕O旋转180º可以与 重合这说明 AOB≌ 这两个三角形的对应边是AO与 ——青 sketch template

如图在平行四边形ABCD中AB=5cmBC=9cm∠ABC的平分线交AD于点E交CD的延长线于F．求DF的长．题目和参考答案——青 sketch template

如图四边形ABCD的对角线ACBD相交于O图中共有对对顶角它们是 ——青夏教育精英家教�—— sketch template

如图ABCD是平行四边形E是BC的中点AF是AE的13三角形ADF 的面积是8cm2三角形ABE的面积是1212cm2．——青夏教育 sketch template

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