如图efgh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 Coloring Page

如图efgh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 Template

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tomski如图efgh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 coloring

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�们把依次连接任意四边形ABCD各边中点所得四边形EFGH叫中点四边形．1若四边形ABCD是菱形则它的中点四边形EFGH一定是 sketch template

如图所示在四边形ABCD中EFGH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1矩形MNPQ中点EFGH分别在NPPQQMMN上若∠1＝∠2＝∠3＝∠4则称四边形EFGH为矩形MNPQ的反射四边形 sketch template

如图四边形EFGH的面积是66平方米．EA=ABCB=BFDC=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EFGH分别是四边形ABCD的边ABBCCDDA的中点顺次连接EFGH所得的四边形EFGH显然是平行四边形．1当 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EFGHCD∥平面EFGH 2若 sketch template

如图四边形ABCD中对角线相交于点OEFGH分别是ABBDBCAC的中点．求证四边形EFGH是平行四边形． 题目和参考答案 sketch template

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

题目如图矩形ABCD的长和宽分别为6和4EFGH依次是矩形ABCD各边的中点则四边形EFGH的�长等于 A 20B sketch template

如图，在正方形ABCD中，E、F、G、H分别为AB、CD、BC、AD上的点，EF与GH相交于点P，且EF⊥ GH，连接EG、GF、FH、HE sketch template

如图EFGH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任意四边形ABCD各边中点分别是EFGH若对角线ACBD的长都为20cm则四边形EFGH的�长是 A80cmB 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

如图1四边形ABCD中AC⊥BD于点O点EFGH分别为边ABBCCDAD的中点连接EFFGGHEHBD分别与EF sketch template

几何最值系列——将军饮马知乎 sketch template

如图将矩形纸ABCD的四个角�内折起恰好拼成一个无缝隙无重叠的四边形EFGH若EH＝3厘米EF＝4厘米则边AD的长是 厘米——青夏 sketch template

�国汉代数学家赵爽在注解《�髀算经》时给出的“赵爽弦图”如图所示，它是由四个全等的直角三角形与中间的小正方形拼成的一个大正方形．若大正方形的 sketch template

中点四边形 知乎 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

题目直线ABCD相交于点OOE平分∠BODOF⊥CD垂足为O．1若∠EOF=54°求∠AOC的度数2�在∠AOD的内部 sketch template

如右图，四边形ABCD面积为1，且AB=AE，BC=BF，DC=CG，AD=DH．求四边形EFG 14459 趣�几何数学天地 33IQ sketch template

菱形性质定理百度百� sketch template

如图等腰梯形ABCD中AD∥CBAE∥CDAB=AD=CD=8cm∠C=60°则梯形ABCD的�长为cmA24B32C sketch template

如图EFMN分别是边长为4的正方形ABCD四条边上的点且AE=BF=CM=DN．那么四边形EFMN的面积的最小值是8． 题目和参考 sketch template

顺次连接四边形ABCD各边中点得到四边形EFGH要使四边形EFGH是菱形应添加的条件是AAD∥BCBAC=BDCAC⊥BDDAD sketch template

如图1已知四边形ABCD是正方形对角线ACBD相交于点E以点E为顶点作正方形EFGH．1如图1点AD分别在EH和EF上连接 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

如图1边长为a的正方形�生形变后成为边长为a的菱形如果这个菱形的一组对边之间的距离为h�们把a与h的比值叫做这个菱形的“形变度．1 sketch template

如图长方形EFGH的长HE和宽EF分别是6cm和4cm四边形ABCD的面积为18平方厘米那么阴影部分的面积和为多�平方厘米 题目和 sketch template

如图1ABCD为正方形直线MN分别过AD边与BC边的中点点P为直线MN上任意一点连接PBPC分别与AD边交于EF两点PC与BD交 sketch template

如图1已知四边形ABCD是正方形对角线ACBD相交于点E以点E为顶点作正方形EFGH．1如图1点AD分别在EH和EF上连接 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已知四条线段的长度并且有两个直角求四边形ABCD的面积． 题目和参考答案——青夏教育精英家教�—— sketch template

题目如图1在正方形ABCD中点E是AB边上的一个动点点E与点AB不重合连接CE过点B作BF⊥CE于点G交AD于点F．1 sketch template

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