【自主探究�（1）如图1，在四边形abcd中，ab=ad，∠bad=90°，点e、f分别在边bc、cd上，且∠eaf=45°，若∠b=∠adf Sketch Coloring Page

【自主探究�（1）如图1，在四边形abcd中，ab=ad，∠bad=90°，点e、f分别在边bc、cd上，且∠eaf=45°，若∠b=∠adf Template

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tomski【自主探究�（1）如图1，在四边形abcd中，ab=ad，∠bad=90°，点e、f分别在边bc、cd上，且∠eaf=45°，若∠b=∠adf coloring

【自主探究�（1）如图1，在四边形ABCD中，AB=AD，∠BAD=90°，点E、F分别在边BC、CD上，且∠EAF=45°，若∠B=∠ADF sketch template

问题背景：如图1，在四边形ABCD中，AB=AD，∠BAD=120°，∠B=∠ADC=90°，E，F分别是BC，CD上的点，且∠EAF=60 sketch template

在四边形ABCD中 Word文档在线阅读与下载无忧文档 sketch template

题目1如图1在四边形ABCD中AB=AD∠BAD=120°∠B=∠ADC=90°．EF分别是BCCD上的点．且∠EAF 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

如图，在四边形ABCD中，∠B=60°，AB=BC．（1）如图1，已知∠D=120°，�∠A ∠C=；�连接BD，在图1中画出将 BCD绕点B sketch template

题目1问题探究如图�在四边形ABCD中AB∥CDE是BC的中点AE是∠BAD的平分线则线段ABADDC之间的等量关系为 sketch template

题目综合与实践四边形旋转中的数学“智慧数学小组在课外数学活动中研究了一个问题请帮他们解答．任务一如图1在矩形ABCD中EF sketch template

【初步探索�（1）如图�，在四边形ABCD中，AB=AD，∠B=∠ADC=90° E、F分别是BC、CD上的点且EF=BE FD探究图中 sketch template

百度教育 sketch template

百度教育 sketch template

题目如图在四边形ABCD中∠B＝60°∠D＝30°AB＝BC．1求∠A ∠C的度数2连接BD探究ADBDCD三者 sketch template

百度教育 sketch template

百度教育 sketch template

百度教育 sketch template

题目如图在四边形中于1求证2若求四边形的面积．题目和参考答案——青夏教育精英家教�—— sketch template

探究：（1）如图1，在正方形ABCD中，E、F分别是BC、CD上的点，且∠EAF=45°，试判断BE、DF与EF三条线段之间的数量关系，直接 sketch template

1操作�现如图1在矩形ABCD中E是BC的中点将 ABE沿AE折叠后得到 AFE点F在矩形ABCD内部延长AF交CD于点G sketch template

题目定义有一组邻边相等且对角互补的四边形叫做等补四边形．1如图1点ABC在⊙O上∠ABC的平分线交⊙O于点D连接ADCD sketch template

百度教育 sketch template

（1）问题探究：如图1，在正方形ABCD中，对角线AC，BD相交于点O．在线段AO上任取一点P（端点除外），连接PD，PB．�求证：PD=PB sketch template

题目如图在 ABC中AD是∠BAC的平分线DE⊥AC于EDF⊥AB于F且FB=CE则下列结论�DE=DF�AE=AF sketch template

百度教育 sketch template

（1）问题探究：如图1，在正方形ABCD中，点E，Q分别在边BC、AB上，DQ⊥AE于点O，点G，F分别在边CD、AB上，GF⊥AE．�判断 sketch template

小明学习了特殊的四边形 平行四边形后对特殊四边形的探究产生了兴趣�现另外一类特殊四边形如图1�们把两条对角线互相垂直的四边形叫做垂美 sketch template

历年中考数学几何压轴专题，中考几何专题训练及参考答案知乎 sketch template

初二下（八下）数学期末压轴题训练—勾股定理（合集1）知乎 sketch template

综合与实践：问题情境：如图1，在矩形ABCD中，AB=6，BC=8，将矩形ABCD绕点A顺时针旋转得到矩形AB′C′D′，使得点C′落在AD的 sketch template

如图1在四边形ABCD中如果对角线AC和BD相交并且相等那么�们把这样的四边形称为等角线四边形．1�在“平行四边形矩形菱形 中 sketch template

如图，在 ABCD中，BC=18，AB=15，BE平分∠ABC，交AD于点E，则ED=． sketch template

百度教育 sketch template

题目如图 ABC中∠ABC=90°AC=25cmBC=15cm1设点P在AB上若∠PAC =∠PCA求AP的长2设点 sketch template

如图，在多面体中，四边形是菱形，，，，，，．高途 sketch template

某学校活动小组在作三角形的拓展图形研究其性质时经历了如下过程操作�现1如图1分别以AB和AC为边� ABC外侧作等边 ABD和 sketch template

题目探究如图1在 ABC中AB=ACCF为AB边上的高点P为BC边上任意一点PD⊥ABPE⊥AC垂足分别为点DE．求证 sketch template

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