如图在正三角形abc中def分别为各边的中点ghij分别为afadbede的中点．将 abc沿deefdf折成三棱锥 Sketch Coloring Page

如图在正三角形abc中def分别为各边的中点ghij分别为afadbede的中点．将 abc沿deefdf折成三棱锥 Template

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tomski如图在正三角形abc中def分别为各边的中点ghij分别为afadbede的中点．将 abc沿deefdf折成三棱锥 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

三角形中线的定理？知乎 sketch template

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三角形中线的定理？知乎 sketch template

已知在三角形abc中知识要点北京爱智康 sketch template

如图在 ABC中分别以ABAC为边�外作等腰直角三角形ABE等腰直角三角形ACD其中∠BAE=∠CAD=90°BD与CE相交于点O sketch template

如图在三角形ABC中BDDC=12E为AD的中点若三角形ABC的面积为120平方厘米则阴影部分的面积是多�平方厘米题目和参考 sketch template

如图1Rt ABC中∠C=90°按题目所给条件及要求将相应的直角三角形分割成若干个全等的并且分别与原三角形相似的三角形．画出图形并简要 sketch template

如图在三角形ABC中BE=EF=FCED=2DA求阴影部分的面积是三角形ABC面积的几分之几题目和参考答案——青夏教育精英家教�—— sketch template

如图所示三角形abc是边长为1的正三角形 三角形bdc是顶角为120度的等腰三角形 以d为顶点做一个60是度的角m 百度知道 sketch template

百度教育 sketch template

如图， ABC为等边三角形，以BC为斜边�下作等腰直角三角形BDC，连接AD交BC于点O．E为线段AC上一动点（不与A，C重合），连接BE sketch template

如图在正三角形ABC中DEF分别为各边的中点GHIJ分别为AFADBEDE的中点．将 ABC沿DEEFDF折成三棱锥 sketch template

如图在直角三角形ABC中放置边长分别34x的三个正方形则x的值为 ．题目和参考答案——青夏教育精英家教�—— 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

如图已知正三角形ABC的边长为1EFG分别是ABBCCA上的点且AE=BF=CG设 EFG的面积为yAE的长为x则y关于x sketch template

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如图，在 ABC中，∠ABC＝90°，AB＝BC，三角形的顶点在相互平行的三条直线l1，l2，l3上，且l1，l2的距离为2，l2，l3的距离 sketch template

15．如图所示已知等腰直角三角形ABC中∠ACB=90°直线L经过点C AD ⊥LBE⊥L垂足分别为DE． 1证明 ACD 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在 ABC中BDCE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

20． 如图，三角形ABC中，BD平分∠ABC，AD垂直于BD，三角形BCD的面积为45，三角形ADC的面积为20，则三角形ABD的面积等于 sketch template

如图在直角三角形ABC中∠BAC=90°将 ABC沿直线BC�右平移得到 DEF连结ADAE则下列结论中不成立的是 A．AD∥ 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在 ABC∠A=36°D为AC边上的一点AD=BD=BC则图中的等腰三角形共有个 A2B3C4D5——青夏教育 sketch template

三角形ABC在正方形�格中的位置如图所示�格中每个小方格的边长为1个单位长度请根据下列提示作图1将三角形ABC�上平移3个单位长度再 sketch template

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如图在正三角形ABC中DEF分别为各边的中点GHIJ分别为AFADBEDE的中点．将 ABC沿DEEFDF折成三棱锥 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

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

如图，在直角三角形ABC中，∠ACB=90°，∠CBA=30°，请你设计三种不同的分法，把 ABC分割成两个三角形，且 ZOL问答 sketch template

如图在三棱锥S ABC中底面ABC是边长为4的正三角形侧面SAC⊥底面ABCSA=SC=23MN分别为ABSB的中点．Ⅰ求证 sketch template

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