在 abc中，d为ab上的中点，e为线段ac上的点，且de = 12bc，什么时候有两条de？知乎 Sketch Coloring Page

在 abc中，d为ab上的中点，e为线段ac上的点，且de = 12bc，什么时候有两条de？知乎 Template

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tomski在 abc中，d为ab上的中点，e为线段ac上的点，且de = coloring

在 ABC中，D为AB上的中点，E为线段AC上的点，且DE = 1/2BC，什么时候有两条DE？知乎 sketch template

如图，在正三角形ABC中，AB=6，D、E分别为AC、BC上的动点，知乎 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

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 ABC中点D在AC上E在AB上且AB=ACBC=CDAD=DE=BE 1求证 BCE≌ DCE 2求∠EDC的度数 sketch template

题目如图 ABC中D为边AB上一点E是CD的中点且∠ACD＝∠ABE．已知AC＝2设AB＝xAD＝y则y与x满足的关系式为 sketch template

25．如图在 ABC中 DE分别是ACAB上的点 BD与CE交于点O 给出下列三个条件�∠EBO＝∠DCO�∠BEO＝∠CDO sketch template

如图AB是半圆⊙O的直径 ABC的两边ACBC分别交半圆于DE且E为BC的中点已知∠BAC=50°则∠C= A 55 sketch template

ABC中，点D为BC边的中点，点E在AC边上，AD和BE相交于点F，满足AF=BD和AE=EF，求∠ADB的度数 Readalps 博客园 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

题目已知点C在线段AB上AC=2BC点DE在直线AB上点D在点E的左侧1若AB=18DE=8线段DE在线段AB上移动�如图 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

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如图在 ABC中AB=ACD为AC上一点E为AB上一点且BD=BCAD=DE=BE试求 ABC各内角的度数．题目和参考答案 sketch template

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在 ABC中D为边AC上一点AB=AC=6AD=4若 ABC的外心恰在线段BD上则BC=3$sqrt{6}$．题目和参考答案 sketch template

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25．如图在 ABC中 DE分别是ACAB上的点 BD与CE交于点O 给出下列三个条件�∠EBO＝∠DCO�∠BEO＝∠CDO sketch template

14．如图点DEF分别是 ABC三边上的中点．若 ABC 的面积为12则 DEF的面积为 ．——青夏教育精英家教�—— sketch template

ABC中，点D为BC边的中点，点E在AC边上，AD和BE相交于点F，满足AF=BD和AE=EF，求∠ADB的度数 Readalps 博客园 sketch template

已知在等边三角形ABC中DE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 ABC中 DE分别是ACAB上的点 BD与CE交于点O 给出下列三个条件 �∠EBO＝∠DCO�∠BEO＝∠CDO sketch template

如图在等边 ABC中点DE分别为ABAC边的中点点F为BC边上一点CF=1连接DF以DF为边作等边 DFG连接AG且∠ sketch template

如图在 ABC中D为BC的中点E为AB边上的一点AB=3BE已知四边形BDME的面积是35求 ABC的面积．题目和参考答案——青 sketch template

如图在 ABC中∠C=90°AC=BC点D为AB的中点点EF分别为ACBC边上的动点且CE=BF当点EF分别在边ACBC sketch template

如图在 ABC中EF分别是ABAC的中点 则 ——青夏教育精英家教�—— sketch template

如图，在 ABC中，AB=AC，以AB为直径的⊙O与BC相交于点D，且DE⊥AC，垂足为E． sketch template

如图 ABC中DE是ABAC上的点且∠ADE=∠C AED ∽ ABC 则对应角是对应边是 ——青夏教育精英家教�—— sketch template

如图在 ABC中∠C=90°AC=BC点D为AB的中点点EF分别为ACBC边上的动点且CE=BF当点EF分别在边ACBC sketch template

如图在等边 ABC中DE分别是BCAC上的点且BD=CEAD与BE相交于点P则∠1 ∠2的度数是 A．45°B．55°C sketch template

在三角形ABC中点D是BC的中点点E在AB上且AEEB=12AD与CE相交于点F则S ABCS FED= ．题目和参考答案 sketch template

如图在 ABC中AB的垂直平分线EF交BC于点E交AB于点FD为线段CE的中点BE=AC1求证AD⊥BC2若∠BAC sketch template

百度教育 sketch template

如图在 ABC中已知点DE分别在ABAC上BE与CD相交于点O依据下列各个选项中所列举的条件不能说明AB=AC的是 A．BE sketch template

题目在 ABC中AB=AC∠BAC=60°点E为直线AC上一点D为直线BC上的一点且DA=DE．当点D在线段BC上时如图� sketch template

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