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 #1503 L 'Algérie

AbdouGt Zizou
sketch #1503 L 'Algérie

sketch #2627 Taz by sketchmaster

sketchmaster
sketch #2627 Taz by sketchmaster

sketch #3012 Girl by Safa M. Esam Srk

anonymous

anonymous
sketch #3012 Girl by Safa M. Esam Srk

sketch #3457

anonymous

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sketch #2479 C 'est qui ? Un rasta qui a manger trop de poulpe farcis. ? Un vieux chanteur de blue grass ? Najdica tomktoo ? A vous de me dire...

Pascal Quéru
sketch #2479 C 'est qui ? Un rasta qui a manger trop de poulpe farcis. ? Un vieux chanteur de blue grass ? Najdica tomktoo ? A vous de me dire...

sketch #3698

anonymous

anonymous
sketch #3698

sketch #4921

anonymous

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sketch #4921

sketch #2977 Spongebob Germaine Hoens

anonymous

anonymous
sketch #2977 Spongebob Germaine Hoens

sketch #3857

anonymous

anonymous
sketch #3857

sketch #4520

anonymous

anonymous
sketch #4520

sketch #2852 Teddy Zorka Edding Giustinianovic

Zorka Edding Giustinianovic
sketch #2852 Teddy Zorka Edding Giustinianovic

sketch #5204

anonymous

anonymous
sketch #5204

sketch #2279 puppetsss

anonymous

anonymous
sketch #2279 puppetsss

sketch #214 bugs bunny

anonymous

anonymous
sketch #214 bugs bunny

sketch #3290 Calvin and Hobbes by অনন্ত জলিল

anonymous

anonymous
sketch #3290 Calvin and Hobbes by অনন্ত জলিল

sketch #970 Depression

anonymous

anonymous
sketch #970 Depression

sketch #5083

anonymous

anonymous
sketch #5083

sketch #5117

anonymous

anonymous
sketch #5117

sketch #2431 face :D

anonymous

anonymous
sketch #2431 face :D

sketch #1447 donara

Donara Smbatyan
sketch #1447 donara

sketch #5018 Owl by Komlós László

anonymous

anonymous
sketch #5018 Owl by Komlós László

sketch #5160 Marilyn Monroe by Muhammet Karadoğan

anonymous

anonymous
sketch #5160 Marilyn Monroe by Muhammet Karadoğan

sketch #961

anonymous

anonymous
sketch #961

sketch #3052

anonymous

anonymous
sketch #3052

sketch #4698

anonymous

anonymous
sketch #4698

sketch #1418 Dylan Thomas. Chayrolfrypan

anonymous

anonymous
sketch #1418 Dylan Thomas. Chayrolfrypan

sketch #717

anonymous

anonymous
sketch #717

sketch #5303

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sketch #5311

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sketch #3871

anonymous

anonymous
sketch #3871

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

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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在三角形ABC中三角形AEO的面积是1三角形ABO的面积是2三角形BOD的面积是3则四边形DCEO的面积是多�——青夏教育精英 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

如图，在三角形 ABC 中， D 是 BC 的中点， E 、 F AC 的三等分点。已知三角形 的面积是 108 平方厘米。求三角 sketch template

如图在三角形ABC中点DF在边BC上点E在边AB上点G在边AC上∠CDG=∠B∠1 ∠FEA=180°．证明AD∥EF． 题目 sketch template

百度教育 sketch template

如图所示在三角形ABC中D为BC的中点AD和BE相交F点已知三角形ABC的面积为42平方厘米求三角形BDF的面积． 题目和参考答案 sketch template

题目已知如图 ABC和 CDE均为等边三角形BCD三点在同一条直线上连接线段BEAD交于点F连接CF1求证∠FBC sketch template

如图中三角形ABC的面积是平行四边形DBCE面积的 A．一半 B．2倍 C．相等 题目和参考答案——青夏教育精英家教�—— 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

如图在三角形ABC中D为 BC的中点 AF=2BFCE=3AE连接CF交 DE于 P点求EPDP的值． 题目和参考答案——青夏教育 sketch template

如图 ABC是等边三角形分别延长CAABBC到A′B′C′使AA′=BB′=CC′=AC若 ABC的面积为1则 A′B′C sketch template

百度教育 sketch template

7分如图在 ABC中∠BAC=60°AE是 ABC中与∠BAC相邻的外角的平分线且AE∥BC则 ABC是等边三角形吗为什么百度教育 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，在三角形ABC中已知∠ A = 90° ∠ C 60° 。把三角形ABC绕点B按顺时针方�旋转一定的角度后，得到三角形A B 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

如图三角形ABC中E为AC之中点．BD=2DCAD与BE交于F则三角形BDF的面积四边形DCEF的面积=8787． 题目和参考答案 sketch template

如图在三角形ABC中BC=8厘米AD=6厘米EF分别为AB和AC的中点．那么三角形EBF的面积是66平方厘米．——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ABBCCA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

如图在正三角形ABC中DEF分别为各边的中点GHIJ分别为AFADBEDE的中点．将 ABC沿DEEFDF折成三棱锥 sketch template

百度教育 sketch template

百度教育 sketch template

百度教育 sketch template

如图，在 ABC中，∠ ACB=90° ，AC=BC，AE是BC边的中线，过点C作CF⊥ AE，垂足为点F，过点B作BD⊥ BC交CF的 sketch template

连结三角形两边中点的线段叫做三角形的中位线如图�，在 ABC 中，D，E分别是AB，AC的中点，DE 就是 的一条中位线 �们可 sketch template

5．如图在Rt ABC中CD是斜边AB上的高则图中的相似三角形共有 3对 D4对提示考�Rt ABC与Rt ACD sketch template

如图等边三角形ABC中DE分别为ABBC边上的两个动点且总使BD=CEAE与CD交于点FAG⊥CD于点G则以下结论∠AFG sketch template

百度教育 sketch template

如图在三角形ABC中D为 BC的中点 AF=2BFCE=3AE连接CF交 DE于 P点求EPDP的值． 题目和参考答案——青夏教育 sketch template

百度教育 sketch template

百度教育 sketch template

如图所示三角形ABC中D是AB边的三等分点E是AC边的四等分点已知三角形A DE的面积是1平方厘米．求三角形ABC的面积是多�平方 sketch template

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