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 Coloring Page

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 Template

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sketch #4300 República, comunismo, libertad

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sketch #4300 República, comunismo, libertad

sketch #5219 Zayn Malik by Amila Madhushanaka

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sketch #5219 Zayn Malik by Amila Madhushanaka

sketch #949 jbj

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sketch #949 jbj

sketch #3732 Michael Jackson by David Obando

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sketch #3732 Michael Jackson by David Obando

sketch #5249 Adele - Skyfall by Mert Arda Yiğit

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sketch #5249 Adele - Skyfall by Mert Arda Yiğit

sketch #3686 Toy Story by Thania Arruda

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sketch #3686 Toy Story by Thania Arruda

sketch #2969

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sketch #2969

sketch #2639 Marilyn by sketchmaster

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sketch #2639 Marilyn by sketchmaster

sketch #5178 Mewtwo and Transformation by Riley Hart

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sketch #5178 Mewtwo and Transformation by Riley Hart

sketch #5188 Paul Walker by Taï Marsan

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sketch #5188 Paul Walker by Taï Marsan

sketch #5101

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sketch #5101

sketch #2691

Gaurav Patel
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sketch #5070 The Rolling Stones by Roby Krdoso

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sketch #5070 The Rolling Stones by Roby Krdoso

sketch #4702

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sketch #4702

sketch #1114 fire flame camping bonfire

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sketch #1114 fire flame camping bonfire

sketch #3626 Skream by Wellen Lima

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sketch #3626 Skream by Wellen Lima

sketch #4769 Finn and Jake by Neo Ʀazor

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sketch #4769 Finn and Jake by Neo Ʀazor

sketch #3439 Aralé by Malyi Link

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sketch #3439 Aralé by Malyi Link

sketch #4232 Tobirama by Kadi Kader

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sketch #4232 Tobirama by Kadi Kader

sketch #4995

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sketch #4995

sketch #2904 Pinky and the Brain by Tim Poole

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sketch #2904 Pinky and the Brain by Tim Poole

sketch #5095 Lion by Frederic Knauer

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sketch #5095 Lion by Frederic Knauer

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Laura Agapi Asnicar
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sketch #2987

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sketch #5230

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sketch #5083

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sketch #3637

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sketch #961

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tomski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 coloring

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

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，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

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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

已知在三角形abc中知识要点北京爱智康 sketch template

题目如图所示边长为2的等边三角形ABC中D点在边BC上运动不与BC重合点E在边AB的延长线上点F在边AC的延长线上AD sketch template

百度教育 sketch template

百度教育 sketch template

如图在 ABC中AB=AC∠A=36°请你设计三种不同的方法将 ABC分割成三个等腰三角形不要求写出画法不要求证明但是要标出所 sketch template

三角形“四心”有关性质及证明（内心篇） 知乎 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

判断点是否在三角形内部（�量，行列式，点乘叉乘知识点串联） 知乎 sketch template

如图，在 ABC中，点D是BC上一点，E是AD上一点，EB=EC，∠ABE=∠ACE。求证：AD⊥BC sketch template

如图在三角形ABC中AB=ACD是BC上一点∠BAD=40°E是AC上一点AD=AE求∠EDC的度数． 题目和参考答案——青夏 sketch template

14．如图在 ABC中∠B=90°两直角边AB=5BC=12三角形内有一点P到各边的距离相等求点P到各边的距离——青夏教育精英家教�—— sketch template

百度教育 sketch template

如图在三角形ABC中∠ACB=90°∠B=50°将此三角形绕点C沿顺时针方�旋转后得到三角形A′B′C若点B′恰好落在线段AB上 sketch template

如图在三角形ABC中BDDC=12E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

百度教育 sketch template

题目如图点ABC在一条直线上 ABD BCE均为等边三角形连接AE和CDAE分别交CDBD于点MPCD交BE于点Q sketch template

如图在三角形ABC中AB＞ACDE分别是ABAC上的点 ADE沿线段DE翻折使点A落在边BC上记为A′．若四边形ADA′E是 sketch template

如图．已知点BCD在同一条直线上． ABC和 CDE都是等边三角形BE交AC于FAD交CE于H1求证 BCE≌ ACD2 sketch template

如图在 ABC中AB的垂直平分线EF交BC于点E交AB于点FD为线段CE的中点BE=AC1求证AD⊥BC2若∠BAC 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AEBD．点M是BD的中点点N是AE的中点．1在图 sketch template

百度教育 sketch template

百度教育 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等边三角形ABC中AB=5延长BC至点P使CP=3将 ABC绕点B顺时针旋转a角得到 DBE连接DPEP则当 DPE为 sketch template

如图在 ABC中DE∥BC且AD=3DB=2．写出图中的相似三角形并指出其相似比． 题目和参考答案——青夏教育精英家教�—— sketch template

题目如图在平面直角坐标系中点的坐标为以线段为边在第四象限内作等边三角形点为正半轴上一动点 连接以线段为边在第四象限内作等边三角 sketch template

题目1如图1在四边形ABCD中FE分别是BCAD的中点连结EF并延长分别与BACD的延长线交于点MN则∠BME=∠ sketch template

百度教育 sketch template

题目如图三角形ABC中AB=3AC=4以BC为边�三角形外作等边三角形BCD连AD则当∠BAC= 度时AD有最大值． 题目和 sketch template

题目如图在4×4的方格纸中 ABC的三个顶点都在格点上．1在图1中画出一个与 ABC成中心对称的格点三角形2在图2中画出 sketch template

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