20．如图点p为 Abc的内心延长ap交 Abc的外接圆于d在ac延长线上有一点e满足ad＝ab·ae求证de是⊙o的切线第 Sketch Coloring Page

20．如图点p为 Abc的内心延长ap交 Abc的外接圆于d在ac延长线上有一点e满足ad＝ab·ae求证de是⊙o的切线第 Template

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Take a peek at some of the sketches created by our users, are you a sketchite?

sketch #1536 Dark Night

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sketch #5165 Marceline by Marvin Chrome

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sketch #5341 Rafael Nadal by Alina Danielle

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sketch #1551 donara

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sketch #3693 Lucy from Elfen Lied by Simona Honigmelone

sketch #828 Were Fools

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sketch #828 Were Fools

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sketch #1060

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sketch #3261

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sketch #5197 Rihanna by Ben Hall

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sketch #5197 Rihanna by Ben Hall

sketch #5184 Walter White by Abdul Ghony

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anonymous
sketch #5237 Gotye by Jhonatan Soares

sketch #5289

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sketch #5102 Old Man by Cuong Pham

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sketch #2715 Angelina

Na Ruro
sketch #2715 Angelina

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sketch #5278 Cosmos by Jenna Khoùlix�

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tomski20．如图点p为 abc的内心延长ap交 abc的外接圆于d在ac延长线上有一点e满足ad＝ab·ae求证de是⊙o的切线 coloring

20．如图点P为 ABC的内心延长AP交 ABC的外接圆于D在AC延长线上有一点E满足AD＝AB·AE求证DE是⊙O的切线 第 sketch template

三角形四心知乎 sketch template

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三角形内心外心联袂模型以圆为背景的 有哪些经典结论知乎 sketch template

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

如图，三角形abc为圆o的内接三角形，i为三角形abc的内心，ai的延长线交bc于点e，交圆o于点d。�求证：db=d 百度知道 sketch template

三角形“四心”有关性质及证明（垂心篇）知乎 sketch template

如图，D为圆锥的顶点，O是圆锥底面的圆心，AE为底面直径，AE=AD． ABC是底面的内接正三角形，P为DO上一点，PO=√6/6DO sketch template

$1如图1点P为 ABC的内角平分线BP与CP的交点求证∠BPC=90° $frac{1}{2}$∠A2如图2点P为 ABC sketch template$

三角形“四心”有关性质及证明（重心篇）知乎 sketch template

如图点I是三角形ABC的内心连接AI并延长交BC于点E交三角形ABC的外接圆于点D连接BD．1若∠BAC=70°∠D=40°求 sketch template

如图点H为 ABC的垂心以AB为直径的⊙O1和 BCH的外接圆⊙O2相交于点D延长AD交CH于点P求证点P为CH的中点．题目和参考 sketch template

如图，在四边形ABCD中，对角线AC与BD交于点O，已知OA =OC，OB=OD，过点O作EF⊥ BD，分别交AB、DC于点E，F，连接DE sketch template

如图，点O是 ABC外接圆的圆心，点I是 ABC的内心，连接OB，IA．若∠CAI=38°，则∠OBC的度数为（） A15° B14° C sketch template

如图P是 ABC的重心过点P作PE∥AB交BC于点EPF∥AC交BC于点F若 PEF的�长是6则 ABC的�长为18．题目和参考 sketch template

初中数学：几何板块五类题型汇总，共计20道例题初二 sketch template

易湃高中数学联赛平面几何100题1 20 知乎 sketch template

如图点P在等边 ABC的内部且PC=6PA=8PB=10将线段PC绕点C顺时针旋转60°得到PC连接AP则sin∠PAP的 sketch template

如图P是 ABC的重心过点P作PE∥AB交BC于点EPF∥AC交BC于点F若 PEF的�长是6则 ABC的�长为18．题目和参考 sketch template

如图所示O是线段AB的中点AB＝2c以点A为圆心2a为半径作一圆其中 1若圆A外的动点P到B的距离等于它到圆�的最短距离 sketch template

如图，在以点O为圆心的两个同心圆中，大圆的弦AB交小圆于点C、D 已知AB=4，CD=2，圆心O到直线AB的距离为1，则大圆的半径为 ，小圆 sketch template

如图�，已知 ABC的内切圆⊙O与AB、BC、AC分别相切于点D、E、F，且EF=DE（1）判断 ABC的形状，并证明你的结论；（2 sketch template

题目如图在Rt ABC中∠C＝90°以顶点A为圆心适当长为半径画弧分别交ACAB于点MN再分别以点MN为圆心大于MN的 sketch template

如图所示在 ABC中∠A=α ABC的内角平分线和外角平分线交于点P且∠P=β试探求下列图中α与β的关系并选择一个加以说明——青 sketch template

59．如图点P是等边 ABC内任意一点过P点分别作各边的平行线 EFMNGH请猜测线段EFMNGH的和是什么当点P 在 sketch template

与三角形有关的角度的计算 sketch template

如图在 ABC中∠ABC的平分线与∠ACD的平分线交于P点． 1若∠ABC=40°∠ACB=80°则∠P= 度 2若∠A sketch template

如图 ABC中AB=ACAB的垂直平分线交AC于点D．若∠A=40°则∠DBC= 若AC BC=10cm则 DBC的�长为 Cm sketch template

如图点P为∠AOB内一点分别作出P点关于OAOB的对称点P1P2连接P1P2交OA于M交OB于NP1P2=20则 PMN的�长 sketch template

20．如图点DEF分别在ABBCAC上且DE∥ACEF∥AB下面写出了说明“∠A ∠B ∠C＝180° 的过程请填空因为 sketch template

如图，∠ACD是 ABC的外角，∠ABC的平分线与∠ACD的平分线交于点A1，∠A1BC的平分线与∠ 百度经验 sketch template

百度教育 sketch template

如图以 ABC的一边AB为直径的半圆与其它两边ACBC的交点分别为DE．且$widehat{DE}$=$widehat{BE sketch template

如图已知 ABC求作一点P使点P到∠BAC两边的距离相等且PA=PB．下列确定点P的方法正确的是 A．P为∠BAC∠ABC的平分 sketch template

如图�们称每个小正方形的顶点为“格点 以格点为顶点的三角形叫做“格点三角形根据图形解答下列问题 1图中的格点 DEF是由格点 sketch template

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