20．已知如图以正方形abcd的对角线为边作菱形aefcb在fe的延长线上．求证aeaf把∠bac三等分．——青夏教育精英家教�—— Sketch Coloring Page

20．已知如图以正方形abcd的对角线为边作菱形aefcb在fe的延长线上．求证aeaf把∠bac三等分．——青夏教育精英家教�—— Template

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sketch #3244 Winnie the Pooh by Ashok Kumar Chaturvedi

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sketch #3244 Winnie the Pooh by Ashok Kumar Chaturvedi

sketch #5232 Avril by Teresa Temacha

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anonymous
sketch #5232 Avril by Teresa Temacha

sketch #5162 Alien by KiNg Buamir

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anonymous
sketch #5162 Alien by KiNg Buamir

sketch #2431 face :D

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anonymous
sketch #2431 face :D

sketch #3774 Marilyn Manson by Junior Silva

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sketch #3774 Marilyn Manson by Junior Silva

sketch #5208 Alf by David Rossien

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anonymous
sketch #5208 Alf by David Rossien

sketch #2220 bahbah sexy sheep

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sketch #2220 bahbah sexy sheep

sketch #2640 Marge by Mirnes Sinanovic

Mirnes Sinanovic
sketch #2640 Marge by Mirnes Sinanovic

sketch #1670

Saifa Mahmud
sketch #1670

sketch #3742 Homer by Koes Maung

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sketch #3742 Homer by Koes Maung

sketch #4605 Goku by Jayme Sousa

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sketch #4605 Goku by Jayme Sousa

sketch #5067

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anonymous
sketch #5067

sketch #1232 Dylan Thomas

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anonymous
sketch #1232 Dylan Thomas

sketch #3538

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anonymous
sketch #3538

sketch #1452 donara

Donara Smbatyan
sketch #1452 donara

sketch #2030

Marlyn Ortiz
sketch #2030

sketch #4232 Tobirama by Kadi Kader

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sketch #4232 Tobirama by Kadi Kader

sketch #3688

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anonymous
sketch #3688

sketch #4903 Naruto & Kurama by Fatér Szilvia

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sketch #4903 Naruto & Kurama by Fatér Szilvia

sketch #5258 Adventure Time by Kheith Ryan Lubiano

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sketch #5258 Adventure Time by Kheith Ryan Lubiano

sketch #3508 Medusa by Nelly Panambo

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sketch #3508 Medusa by Nelly Panambo

sketch #5051

anonymous

anonymous
sketch #5051

sketch #1450

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anonymous
sketch #1450

sketch #3447 Hidan (Akatsuki) by ßeyza Karaca

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sketch #3447 Hidan (Akatsuki) by ßeyza Karaca

sketch #734 ytsfsfsdhgdhgf

Melissa Cogo
sketch #734 ytsfsfsdhgdhgf

sketch #2025

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anonymous
sketch #2025

sketch #1068 dançando

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anonymous
sketch #1068 dançando

sketch #5303

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anonymous
sketch #5303

sketch #962

Wynchz
sketch #962

sketch #5139 Sick Sick Six Urs Stefan

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sketch #5139 Sick Sick Six Urs Stefan

tomski20．已知如图以正方形abcd的对角线为边作菱形aefcb在fe的延长线上．求证aeaf把∠bac三等分．——青夏教育精英家教�—— coloring

如图已知正方形ABCD以CD为边�外作等边三角形CDEBE与AC相交于点F求证EF=CF BF 百度教育 sketch template

百度教育 sketch template

10．如图20 2 15a正方形ABCD和正方形BEFC．操作M是线段AB上一动点从A点至B点移动DM⊥MN交对角线BF于点M sketch template

平面几何定理及证明（3）知乎 sketch template

如图1，已知O为正方形ABCD对角线的交点，点E在边CB的延长线上，连结EO，OF⊥OE交BA延长线于点F，连结EF．1求证：EO＝FO sketch template

如图已知正方形ABCD的边长为4点EF分别在边ABBC上且AE=BF=1CEDF交于点O．下列结论�∠DOC=90°�OC sketch template

20．已知如图以正方形ABCD的对角线为边作菱形AEFCB在FE的延长线上． 求证AEAF把∠BAC三等分．提示证出∠CAE sketch template

已知正方形ABCD如图所示连接其对角线AC∠BCA的平分线CF交AB于点F过点B作BM⊥CF于点N交AC于点M过点C作CP⊥CF交 sketch template

如图正方形ABCD的边长为a分别以正方形的四个顶点为圆心边长为半径在正方形内画弧求图中阴影部分的面积．题目和参考答案——青夏教育 sketch template

如图1已知正方形ABCD的对角线ACBD相交于点OE是AC上一点连接EB过点A作AM⊥BE垂足为MAM交BD于点F．1求证 sketch template

如图，在边长为8的正方形ABCD中，点P，Q分别是边AB，AD上的两动点（点P，Q不与点A，B，D重合），以AP，AQ为邻边作矩形APEQ sketch template

如图1已知正方形ABCD的对角线ACBD相交于点OE是AC上一点连接EB过点A作AM⊥BE垂足为MAM交BD于点F．1求证 sketch template

如图，已知正方形ABCD的边长为2，点E是边CD上的一动点，AF平分∠BAE交边BC于点F．（1）�当点F恰好是边BC的中点时，求线段DE长 sketch template

百度教育 sketch template

如图1，正方形ABCD与正方形AEFG的边AB、AE（AB＜AE）在一条直线上，正方形AEFG以点A为旋转中心逆时针旋转，设旋转角为 百度教育 sketch template

百度教育 sketch template

如图，在正方形ABCD中，点E，F分别在BC，CD上，连接AE，AF，EF，∠EAF=45°．若∠BAE=α，则∠FEC一定等于（） A2α sketch template

题目如图点E是边长为2的正方形ABCD的边BC上的一动点将 ABE沿AE翻折至 AFE的位置若 CDF是等腰三角形则BE sketch template

百度教育 sketch template

10．如图4所示正方形ABCD的对角线相交于点O点E是BC上任意一点EG⊥BD 于GEF⊥AC于F若AC=10则EG EF的值为 sketch template

如图所示正方形ABCD的边长为10厘米EF分别为AB 及BC的中点．四边形BFGE的面积是平方厘米．题目和参考答案——青夏教育精英家教�—— sketch template

如图已知边长为5的正方形ABCD和边长为3的正方形CEFG共顶点C正方形CEFG绕点C旋转60°连接BEDG则 BCE的面积与 sketch template

如图已知正方形边长为20厘米求阴影部分的面积．题目和参考答案——青夏教育精英家教�—— sketch template

如图在正方形ABCD中BF∥AC四边形AEFC为菱形求∠F 的度数——青夏教育精英家教�—— sketch template

如图已知点F是正方形ABCD的边BC的中点CG平分∠DCEGF⊥AF 求证AF=FG——青夏教育精英家教�—— sketch template

如图已知正方形ABCD的边长为2沿对角线AC将三角形ADC折起使平面ADC与平面ABC垂直折叠后BD两点的距离是 B sketch template

如图以直角三角形三边为边长作正方形其中两个以直角边为边长的正方形面积分别为225和400则正方形A的面积是 A．175B．575C sketch template

例1如图已知正方形ABCD的边长为4EF分别是ABAD的中点GC⊥平面ABCD且GC＝2求点B到平面EFG的距离．分析由题设 sketch template

已知如图所示正方形ABCD和正方形AEFG有一个公共点A连接BEDG线段BEDG有怎样的关系请证明你的结论题目和参考答案 sketch template

如图1所示已知正方形ABCD的对角线ACBD相交于OE是AC上一点过A作AG⊥BE垂足为GAG交BD于F1试证明OE sketch template

如图以正方形ABCD平行于边的对称轴为坐标轴建立直角坐标系若正方形的边长为4．1求过BEF三点的抛物线的解析式2求此抛物线的 sketch template

如图1已知四边形ABCD是正方形对角线ACBD相交于点E以点E为顶点作正方形EFGH．1如图1点AD分别在EH和EF上连接 sketch template

20．如图四边形ABCD中已知AB∶BC∶CD∶DA=2∶2∶3∶1且∠B=90° 则∠DAB的度数是 ——青夏教育精英家教�—— sketch template

如图1，一个边长为6的正方形被分割成四个完全相同的直角三角形和一个阴影小正方形（无缝隙、不重叠），现将这四个直角三角形分别沿着正方形四条边� sketch template

如图五面体EF ABCD中ABCD是以点H为中心的正方形EF∥ABEH丄平面 ABCDAB=2EF=EH=1．1证明EH∥ sketch template

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