如图所示已知o是∠epf的平分线上的一点以o为圆心的圆心角的两边分别交于点abcd求证pb=pd若角的顶点p在圆上或圆内上述还 Sketch Coloring Page

如图所示已知o是∠epf的平分线上的一点以o为圆心的圆心角的两边分别交于点abcd求证pb=pd若角的顶点p在圆上或圆内上述还 Template

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tomski如图所示已知o是∠epf的平分线上的一点以o为圆心的圆心角的两边分别交于点abcd求证pb=pd若角的顶点p在圆上或圆内上述还 coloring

如图所示已知O是∠EPF的平分线上的一点以O为圆心的圆心角的两边分别交于点ABCD求证PB=PD若角的顶点P在圆上或圆内上述还 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

已知如图点O是∠EPF的平分线上的一点以O为圆心的圆和角的两边分别交于点AB和CD．求证AB=CD．题目和参考答案——青夏教育 sketch template

如图所示在 ABC中∠ABC与∠ACB的平分线交于点O根据下列条件求出∠BOC的度数． 1如图1已知∠ABC ∠ACB=100 sketch template

如图已知O是直线AB上一点∠1=40°OD平分∠BOC则∠2= A70°B60°C55°D45° 题目和参考答案——青夏 sketch template

如图已知∠BOC=2∠AOCOD平分∠AOB且∠COD=20°求∠AOB的度数．题目和参考答案——青夏教育精英家教�—— sketch template

已知如图∠AOC=90°EF为过点 O的一条直线则∠1与∠2的关系一定成立的是 A 相等 B 互余 C 互补 D 以上都 sketch template

如图AB是半圆⊙O的直径 ABC的两边ACBC分别交半圆于DE且E为BC的中点已知∠BAC=50°则∠C= A 55 sketch template

如图 ABC中AD是∠BAC的平分线AD的垂直平分线AD交于点E交BC的延长线于点F．试说明 ABF∽ CAF．题目和参考答案 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 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

如图O是直线AB上一点OD平分∠AOC．1若∠AOC=60°请求出∠AOD和∠BOC的度数．2若∠AOD和∠DOE互余且∠ sketch template

如图所示已知CD是⊙O的直径∠EOD=84°AE交⊙O于B且AB=OC求∠A的度数．题目和参考答案——青夏教育精英家教�—— sketch template

如图所示O是直线MN上的任意一点射线OA为过O点的一条射线且∠N0A=115°．1过O点画射线OBOCOD使∠AOB=48 sketch template

如图已知O是直线AB上一点∠1=40°OD平分∠BOC则∠2= A70°B60°C55°D45° 题目和参考答案——青夏 sketch template

如图 ABC中AB=AC=12BC=8AD平分∠BAC交BC于点D点E为AC的中点连接DE则 CDE的�长是 A．20B sketch template

如图所示已知 ABC的�长是21OBOC分别平分∠ABC和∠ACBOD⊥BC于D且OD=3则 ABC的面积是多� 题目和参考答案 sketch template

如图1所示已知 ABC中∠BAC=90°AB=ACAE是过点A的一条直线且B点和C点在AE的同侧BD⊥AE于D点CE⊥AE于E点 sketch template

如图所示BD是∠ABC的平分线DE⊥AB于ES ABC＝36cm2AB＝18cmBC＝12cm试求DE的长．题目和参考答案——青 sketch template

如图线段AB经过圆心O交⊙O于点AC∠A=∠B=30º边BD交⊙O于点D试说明BD是⊙O的切线——青夏教育精英家教�—— sketch template

如图所示，∠1＝∠2＝∠3，图中所有锐角之和等于180°，求∠AOB的度数百度教育 sketch template

如图所示有五个力作用于同一点O表示这五个力的有�线段恰构成一个正六边形的两邻边和三条对角线已知F1=10 N则这五个力的合力大小为多� sketch template

如图所示已知F是以O为圆心BC为直径的半圆上任一点A是的中点AD⊥BC于点D求证AD=BF——青夏教育精英家教�—— sketch template

如图已知 ABC内接于⊙O∠A的外角平分线交BC的延长线于D交⊙O于E求证AD2=BD•CD AB•AC．题目和参考答案——青夏 sketch template

如图所示在Rt ABC中∠BAC=90°AB=4AC=3ADAE分别是其角平分线和中线过点C作CG⊥AD于F交AB于G连接 sketch template

如图1所示已知 ABC中∠BAC=90°AB=ACAE是过点A的一条直线且B点和C点在AE的同侧BD⊥AE于D点CE⊥AE于E点 sketch template

如图已知AD为 ABC的角平分线EF为AD的垂直平分线．求证FD2=FB•FC．题目和参考答案——青夏教育精英家教�—— sketch template

2．如图所示已知菱形ABCD的边长为2cm∠BAD＝120°求这个菱形的两条对角线的长．——青夏教育精英家教�—— sketch template

如图所示，平面镜OM与ON垂直放置，在它们的角平分线上P点处，放有一个玻 529379 理�知识知识百� 33IQ sketch template

如图所示已知 ABC和 BDE都是等边三角形且ABD三点共线．下列结论�AE=CD�BF=BG�HB平分∠AHD�∠AHC sketch template

如图所示在∠AOB的两边截取AO=BOCO=DO连接ADBC交于点P考察下列结论其中正确的是 � AOD≌ BOC � APC sketch template

如图所示已知DE平行BCEF平分角AED角1=角2角1=3x 20°，角ACB=（40x 20）°，求角ACB的度数百度知道 sketch template

如图所示已知 ABC内接于⊙OAD平分∠BAC交⊙O于点D过D作⊙O的切线与AC的延长线交于点E �说明BC∥DE �若AB=3 sketch template

如图已知AB为圆O的直径PAPC是圆O的切线AC为切点∠BAC=30°PB交圆O于点D．1求∠APC的大小2若PA sketch template

25．如图4 82已知点P是五边形ABCDE的AB边的中点求作五边形ABCDE关于点P的对称图形．——青夏教育精英家教�—— sketch template

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