如图所示的四边形abcd是边长为2的正方形，对角线ac ， Bd相交于点o 将 Bda沿bd折起到 Bda的位置，使平面abd⊥平面bcd Sketch Coloring Page

如图所示的四边形abcd是边长为2的正方形，对角线ac ， Bd相交于点o 将 Bda沿bd折起到 Bda的位置，使平面abd⊥平面bcd Template

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tomski如图所示的四边形abcd是边长为2的正方形，对角线ac ， bd相交于点o coloring

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，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

如图所示的四边形ABCD是边长为2的正方形，对角线AC ， BD相交于点O 将 BDA沿BD折起到 BDA的位置，使平面ABD⊥平面BCD sketch template

如图所示，四边形ABCD是一个长为4，宽为3，对角线长度为5的长方形．它绕C点接顺时针方�旋转90度，请求出AB边扫过图形的面积．百度教育 sketch template

如图所示四边形ABCD和四边形DEFG都是正方形连接AECG．1观察图形猜想AE与CG之间有怎样的关系并说明理由．2若将正 sketch template

百度教育 sketch template

如上右图四边形ABCD是正方形CE＝MN∠MCE＝35°那么∠ANM 等于 ——青夏教育精英家教�—— 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平行四边形纸条ABCD中EF分别是边ADBC的中点张老师请同学们将纸条的下半部分平行四边形ABFE沿EF翻折得到一个V字形 sketch template

如图所示，四边形ABCD是圆O的内接四边形，AB的延长线与DC的延长线交于点E，且∠D=∠E．1求证：∠ADC=∠CBE； 2求证 sketch template

如图所示P为平行四边形ABCD内一点求证以APBPCPDP为边可以构成一个四边形并且所构成的四边形的对角线的长度恰好分别等于AB sketch template

如图所示正方形ABCD的边长为10厘米EF分别为AB 及BC的中点．四边形BFGE的面积是 平方厘米．题目和参考答案——青夏教育精英家教�—— sketch template

如图所示四边形ABCD是长方形长为10厘米宽为6厘米求阴影部分的�长．题目和参考答案——青夏教育精英家教�—— sketch template

如图所示，四边形ABCD是圆O的内接四边形，AB的延长线与DC的延长线交于点E，且∠D=∠E．1求证：∠ADC=∠CBE； 2求证 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

如图所示在四边形ABCD中AB∥CD且AB=CD对角线AC和BD相交于O若不增加任何字母与辅助线要使四边形ABCD为矩形则还需 sketch template

如图所示在任意凸四边形 ABCD 中取各边的中点并与它相对的一个顶点连结那么所围成的中央四边形面积与�围那四个阴影三角形的面积总和相等吗 sketch template

如图所示，凸四边形ABCD中，对角线AC、BD相交于0点．若三角形AOD的面积是2，三角形COD的面积是1，三角形COB的面积是4，则四边形 sketch template

如图四边形EFGH是由四边形ABCD经过旋转得到的．如果用有序数对21表示方格纸上A点的位置用12表示B点的位置那么四边形 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如图所示的几何体中四边形ABCD为矩形平面ABEF⊥平面ABCDEF∥AB∠BAF=90°AD=2AB=AF=2EF=1点P在 sketch template

如图所示已知空间四边形的每条边和对角线长都等于a点EFG分别为ABADDC的中点则a2等于 A．2BABCB．2AD sketch template

在如图所示的几何体中四边形ABCD为平行四边形∠ACB=90°EA⊥平面ABCDEF∥ABFG∥BCEG∥ACAB=2EF．1 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

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四边形ABCD为菱形 1 用直尺和圆规作出过菱形的顶点 ABC的圆记为⊙O 要求保留作图痕迹不必写出作法 2连接 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

如图所示 在凸四边形ABCD中已知 ∠BAC = 25° ∠BCA 20° ∠BDC 50° ∠BDA 40° 若 sketch template

如图四边形ABCD中CD=CB ∠ABC=∠ADC=90°∠BAC=35°则∠BCD为 A145° B130° C110 sketch template

在如图所示的几何体中四边形ABCD为矩形平面ABEF⊥平面ABCDEF∥AB∠BAF=90°AD=2AB=AF=2EF=1点P在 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

在如图所示的几何体中四边形是正方形平面分别为的中点且 I求证平面平面 II求三棱锥与四棱锥的体积之比 �题 sketch template

如图四边形ABCD是圆内接四边形DB = DC以AD为直径作⊙O交BA的延长线于E交ACBD交于点F设AB 2AC 7 sketch template

四边形ABCD的四边分别为abcd其中ac为对边且满足a2 B2 C2 D2=2ac 2bd则这个四边形一定是A两组角分别相等 sketch template

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