已知 Abc是边长为4的等边三角形bc在x轴上点d为bc的中点点a在第一象限内ab与y轴的正半轴相交于点e点bp是ac上的一个动点 Sketch Coloring Page

已知 Abc是边长为4的等边三角形bc在x轴上点d为bc的中点点a在第一象限内ab与y轴的正半轴相交于点e点bp是ac上的一个动点 Template

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tomski已知 abc是边长为4的等边三角形bc在x轴上点d为bc的中点点a在第一象限内ab与y轴的正半轴相交于点e点bp是ac上的一个动点 coloring

解答题 已知 ABC为边长是4的等边三角形A点坐标为B点在x轴正半轴上C点在第一象限AC与y轴交于D点． 1求BCD三点的坐标 sketch template

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

已知 ABC是边长为4的等边三角形P为平面ABC内一点则$overrightarrow{PA}•overrightarrow{PB sketch template

三角形中线的定理？知乎 sketch template

如图在边长为4的等边 ABC中D为BC的中点E是AC边上一点则BE DE的最小值为2$sqrt{7}$．题目和参考答案——青夏教育 sketch template

已知在三角形abc中知识要点北京爱智康 sketch template

已知2a=5b=10判断a B和ab的大小关系．题目和参考答案——青夏教育精英家教�—— sketch template

已知 ABC是边长为4的等边三角形BC在x轴上点D为BC的中点点A在第一象限内AB与y轴的正半轴相交于点E点BP是AC上的一个动点 sketch template

已知 ABC为边长为10的等边三角形D是BC边上一动点 �如图1点E在AC上且BD=CEBE交AD于F当D点�动时∠AFE的大小 sketch template

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

如图 ABC是边长为2的等边三角形D是AB边的中点P是BC边上的动点Q是AC边上的动点当PQ的位置在何处时才能使 DPQ的�长最小 sketch template

如图所示，已知边长为4的正三角形ABC中，E，F分别为BC和AC的中点，PA=2，且PA⊥平面ABC，设Q是CE的中点（1）求证：AE∥平面 sketch template

如图已知 ABC是等边三角形AB=4D是AC边上一动点EF垂直平分BD分别交ABBC于点EF设CD=xAE=y．1求证 sketch template

百度教育 sketch template

如图，已知 ABC是等边三角形，延长BA至E，延长BC至D，使AE=BD，求证：EC=ED．百度教育 sketch template

等边三角形的高为2则它的面积是 A2 B4 C D4 题目和参考答案——青夏教育精英家教�—— sketch template

题目如图已知 ABC是边长为3的等边三角形点D是边BC上的一点且BD＝1以AD为边作等边 ADE过点E作EF∥BC交AC于点F sketch template

百度教育 sketch template

如图，已知 ABC是边长为2的等边三角形，点D在边BC上，将 ABD沿着直线AD翻折，点B落在点B1处，如果B1D⊥AC，那么BD 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

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

【初中数学�特殊角度的直角三角形（30度、45度）知乎 sketch template

如图1是边长分别为4和3的两个等边三角形纸片ABC和CD′E′叠放在一起．1操作固定 ABC将 CD′E′绕点C顺时针旋转得到 sketch template

如图1是边长分别为4和3的两个等边三角形纸片ABC和CD′E′叠放在一起．1操作固定 ABC将 CD′E′绕点C顺时针旋转得到 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

如图 ABC是面积为a的等边三角形AD是BC边上的高点EF是AD上的两点．则图中阴影部分的面积为 ．题目和参考答案——青夏教育精英家教�—— sketch template

如图已知等边 ABC的边长为6点D为AC的中点点E为BC的中点点P为BD上一点则PE PC的最小值为 A3B32C23D sketch template

已知 ABC是等边三角形以BC为直径的半圆O与边AB相交于点DDE⊥AC垂足为点E．1判断DE与⊙O的位置关系并证明你的结论2 sketch template

已知 ABC是边长为3的等边三角形以BC为底边作一个顶角为120°等腰 BDC．点M点N分别是AB边与AC边上的点并且满足∠MDN sketch template

如图已知等边 ABC以边BC为直径的圆与ABAC分别交于点D点E．过点D作DF⊥AC垂足为F．1判断DF与⊙O的位置关系并证明 sketch template

已知 ABC是边长为1的等边三角形点DE分别是边ABBC的中点连接DE并延长到点F使得DE=2EF则 sketch template

百度教育 sketch template

如图已知三棱锥的底面是直角三角形直角边长分别为3和4过直角顶点的侧棱长为4且垂直于底面该三棱锥的主视图是ABCD——青夏教育 sketch template

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