已知在等边三角形abc中de分别为abac上的点且bd=aeeb与cd相交于点oef⊥cd于点f．求证oe=2of．题目和参考 Sketch Coloring Page

已知在等边三角形abc中de分别为abac上的点且bd=aeeb与cd相交于点oef⊥cd于点f．求证oe=2of．题目和参考 Template

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sketch #3765 Happy easter!

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sketch #5086 Lion by Z Ionut Ady

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anonymous

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anonymous

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sketch #3242 Jolteon by Välë Chäpärrö Järämïllö

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anonymous

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anonymous

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sketch #894 hmmm

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anonymous

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sketch #3539 Octo by Aristo A. Kadir

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sketch #519 The Joker

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tomski已知在等边三角形abc中de分别为abac上的点且bd=aeeb与cd相交于点oef⊥cd于点f．求证oe=2of．题目和参考 coloring

如图，在三角形ABC中，D、E、F分别是BC、CA、AB上的点，AD、BE、CF相交于一点O，这样三角形ABC被分成6个三角形，其中4个三角形 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

三角形中线的定理？知乎 sketch template

已知在等边三角形ABC中DE分别为ABAC上的点且BD=AEEB与CD相交于点OEF⊥CD于点F．求证OE=2OF． 题目和参考 sketch template

如图已知等边三角形ABC在BC的延长线上取一点E以CE为边作等边三角形DCE连接AEBD．点M是BD的中点点N是AE的中点．1在图 sketch template

在等边三角形ABC中点E在AB上点D在CB的延长线上且ED=EC．试探索以下问题1当点E为AB的中点时如图1确定线段AE与DB sketch template

已知：在三角形ABC中，AB=AC角BAC=20度，D点在AB上且AD=BC求角ACD的度数知乎 sketch template

如图所示，边长为2的等边三角形中，D点在边上运动（不与B、C重合），点E在边的延长线上，点F在边的延长线上，． 点D在边上从B至C的运动过程 sketch template

已知等边三角形ABC的边长为12点P为AC上一点点D在CB的延长线上且BD=AP连接PD交AB于点EPE⊥AB于点F则线段EF的长 sketch template

如图1等边三角形ABC的边长为8点P由点B开始沿BC以每秒1个单位长的速度作匀速运动到点C后停止运动点Q由点C开始沿C A B以每 sketch template

已知 ABC为等边三角形点DE分别在BC和AC上并且CD=AE连接ADBE相交于点N过点B作BM⊥AD于点M．1求证BE sketch template

在等边三角形ABC中，点D、E分别在AB、BC边上，连结CD，AE交于点P，且CD=AE，∠ BCD=20°，则∠ APD的度数为 百度教育 sketch template

题目在等边三角形ABC中点D是BC的中点点EF分别是边ABAC含线段ABAC的端点上的动点且∠EDF=120°小明和小慧 sketch template

已知如图在等边三角形ABC中DE分别为BCAC上的点且AE＝CD连结ADBE交于点P作BQ⊥AD垂足为Q．求证BP sketch template

已知 ABC为等边三角形，边长为8，点D，E分别是边AB，BC上的动点，以DE为边作等边三角形DEF1如图1，若点F落在边AC上�求证 sketch template

已知如图在等边三角形ABC中DE分别为BCAC上的点且AE＝CD连结ADBE交于点P作BQ⊥AD垂足为Q．求证BP sketch template

如图等边三角形ABC的边长为1P为AB边上的一个动点过P作PQ⊥BC于Q过Q作QR⊥AC于R再过R作RS⊥AB于S．设AP=xAS sketch template

已知如图在等边三角形ABC中MN分别是ABAC的中点D是MN上任意一点CDBD的延长线分别与ABAC交于FE若1CE sketch template

已知如图1在等边三角形ABC中点DE分别在边ABBC的延长线上且BD=CE联结AECD．1试说明 CBD≌ ACE的理由 sketch template

题目1操作如图在已知内角度数的三个三角形中请用直尺从某一顶点画一条线段把原三角形分割成两个等腰三角形并在图中标注相应的角的 sketch template

如图在等边 ABC中D为AC的中点E是AB上一点且则图中和 ADE相似的三角形有A．1个 B．2个 C．3个D．4个——青夏教育精英 sketch template

三角形“四心”有关性质及证明（内心篇）知乎 sketch template

已知等边三角形ABC的边长为5点P在线段AB上点D在线段BC上且 PDE是等边三角形．1初步尝试若点P与点A重合时BD BE sketch template

如图．已知点BCD在同一条直线上． ABC和 CDE都是等边三角形BE交AC于FAD交CE于H1求证 BCE≌ ACD2 sketch template

已知等边 ABC中点DE分别在边ABBC上把 BDE沿直线DE翻折使点B落在B′处DB′EB′分别交于AC于点FG．若∠ADF sketch template

如图，在三角形 ABC 中， D 是 BC 的中点， E 、 F AC 的三等分点。已知三角形 的面积是 108 平方厘米。求三角 sketch template

已知：在三角形ABC中，AB=AC角BAC=20度，D点在AB上且AD=BC求角ACD的度数知乎 sketch template

如图等腰三角形ABC中AB=AC顶角∠A=20°在边AB上取一点D使AD=BC求∠BDC的度数 题目和参考答案——青夏教育精英家教�—— sketch template

直线y=kx与双曲线y=4x交于Ax1y1Bx2y2两点则2x1y2 5x2y1的值等于． 题目和参考答案——青夏教育精英家教�—— sketch template

题目1如图1在四边形ABCD中FE分别是BCAD的中点连结EF并延长分别与BACD的延长线交于点MN则∠BME=∠ sketch template

如图在 ABC中BDCE分别为三角形的两条高交于点O �问图11中有个三角形与相似它们是 �连结DE ADE与 ABC是否相似 sketch template

在三角形ABC中∠B＝60°BA＝24cmBC＝16cm现有动点P从点A出�沿射线AB�点B方�运动动点Q从点C出�沿射线CB sketch template

百度教育 sketch template

百度教育 sketch template

百度教育 sketch template

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