如图1图2 Abc是等边三角形de分别是abbc边上的两个动点始终保持bd=ce．1当点de运动到如图1所示的位置时求证 Sketch Coloring Page

如图1图2 Abc是等边三角形de分别是abbc边上的两个动点始终保持bd=ce．1当点de运动到如图1所示的位置时求证 Template

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sketch #4264 oh yeah

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tomski如图1图2 abc是等边三角形de分别是abbc边上的两个动点始终保持bd=ce．1当点de运动到如图1所示的位置时求证 coloring

如图， ABC是等边三角形，D是BC边上一点，且满足∠ADE=60∘，DE交等边三角形ABC的外角平分线CE所在直线于点E，试探究AD与DE的 sketch template

如图1已知 ABC是等边三角形DE分别是ABBC上的点且BD=CEAECD交于点F．1求证 ACE≌ CBD2过A作 sketch template

12．如图已知 ABC是等边三角形点DE分别在BCAC上且BD＝CEAD与BE相交于点F1试说明 ABD≌ BCE2 sketch template

题目如图1 ABC为等边三角形点EF分别在BC和AB上且CE=BFAE与CF相交于点H1求证 ACE≌ CBF2求 sketch template

人教版初中数学八年级上册等边三角形的性质和判定公开课优质课课件教案视� 知乎 sketch template

如图所示在等边 ABC中点DE分别在边BCAB上且BD=AEAD与CE交于点F则∠DFC的度数为 A．60°B．45°C sketch template

如图已知等边三角形ABC中内有一点PPA=3PC=4PB=5求此等边三角形ABC的边长百度知道 sketch template

如图，三角形ABC三角形CDE为等边三角形，BCD在一条线上，等边三角形ABC等 60813 趣�几何数学天地 33IQ sketch template

百度教育 sketch template

题目：如图，在三角形ABC中，点D是AB的中点，∠DAC=2∠DCA，∠DCB=30度，求∠B的度数知乎 sketch template

如图等边三角形ABC的边长为6A、B、A1三点在一条直线上且 ABC≌ A1BC1若D为线段BC1上一动点则AD CD的最小值是 sketch template

如图1在等边 ABC的边AC的延长线上取一点E以CE为边作等边 CDE使它与 ABC位于直线AE的同侧．1同学们对图1进行了热烈的 sketch template

百度教育 sketch template

题目已知如图 ABC和 CDE均为等边三角形BCD三点在同一条直线上连接线段BEAD交于点F连接CF1求证∠FBC sketch template

如图，在等边三角形ABC的三边上，分别取点D，E，F，使得 DEF为等边三角形，求证：AD＝BE＝CF．——青夏教育精英家教�—— sketch template

把等边三角形ABC的每条边6等分组成如下图的三角形�，如图中每个小三角形的面积都是1平方厘米。求图中三角 百度知道 sketch template

1如图1所示若P为等边 ABC内一点∠BPC=150° BPP′是等边三角形求证PC2 PB2=PA22如图2所示点P为 sketch template

百度教育 sketch template

如图， ABC是等边三角形，它的面积为1，延长BC至D，使BD=2BC，延长CA至E，使CE=3CA，延长AB至F，使AF=4AB，求 DEF sketch template

已知 ABC中AB=AC∠BAC=α DBC为等边三角形．1如图1∠ABD= 2如图2若∠BCE=150°∠ABE=60 sketch template

如图在边长为2的等边 ABC中AD⊥BC于点D且AD=$sqrt{3}$E为AC中点P为AD上一点则 PEC�长的最小值是 sketch template

如图Rt ABC中∠ACB=90°．1分别以ABAC为边�外作等边三角形ABD和等边三角形ACE连接CE交AB于点F若∠BAC sketch template

如图已知等边 ABC1如图1P为等边 ABC外一点且∠BPC=120°求证PA=PB PC2如图2P为等边 ABC内一点 sketch template

如图，菱形ABCD中，∠BAD=120°，M为BC上一点，N为CD上一点，若 AMN中有一个角为60°，请说明 AMN是等边三角形小明的解答 sketch template

如图 ABC为等边三角形以边BC为直径的半圆与边ABAC分别交于DF两点过点D作DE⊥AC垂足为点E．1判断DE与⊙O的位置 sketch template

如图已知 ABC和 DCE均是等边三角形点BCE在同一条直线上AE与BD交于点O与CD交于点GAC与BD交于点F连接OC．求证 sketch template

百度教育 sketch template

如图用三个边长为a的等边三角形拼成如图1所示的等腰梯形现将这个等腰梯形截成四个全等的等腰梯形然后将其中的一个等腰梯形按照上述方法再截 sketch template

1如图1所示在等边 ABC中点D是AB边上的动点以CD为一边�上作等边 EDC连接AE求证AE∥BC中等边 ABC的形状改 sketch template

题目如图在四边形ABCD中AB∥CDAB＝CD∠A＝∠ADCEF分别为ADCD的中点连接BEBF延长BE交CD的延长线 sketch template

如图，Rt ABC中，∠C＝90°，AC＝BC，点D、E分别是边AB、AC上的点，把 ADE沿DE折叠，点A恰好落在BC上的点F处，若点F为 sketch template

如图1图2 ABC是等边三角形DE分别是ABBC边上的两个动点始终保持BD=CE．1当点DE运动到如图1所示的位置时求证 sketch template

如图等边 ABC其边长为1D是BC中点点EF分别位于ABAC边上且∠EDF=120°．1直接写出DE与DF的数量关系2 sketch template

如图O是等边 ABC内的一点已知∠AOB=110°∠COD=60°∠BOC=α BOC≌ ADC．1求证 COD是等边三角形 sketch template

如图在 ABC中AB=AC=16cmDE垂直平分AB请问 1 当AE=13cm时BE有多长 2 当 BEC的�长为 sketch template

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