21．如图所示已知d是等腰三角形底边bc上一点它到两腰的距离分别为请你指出当d点在什么位置时并加以证明——青夏教育精英家教�—— Sketch Coloring Page

21．如图所示已知d是等腰三角形底边bc上一点它到两腰的距离分别为请你指出当d点在什么位置时并加以证明——青夏教育精英家教�—— Template

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tomski21．如图所示已知d是等腰三角形底边bc上一点它到两腰的距离分别为请你指出当d点在什么位置时并加以证明——青夏教育精英家教�—— coloring

21．如图所示已知D是等腰三角形底边BC上一点它到两腰的距离分别为请你指出当D点在什么位置时并加以证明——青夏教育精英家教�—— sketch template

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21如图，已知等腰直角三角形ABC，点P是斜边BC上一点不与B，C重合，PE是 ABP的外接圆⊙O的直径．1求证： APE是等腰直角 sketch template

21．已知如图为上一点点AD分别在两侧．．求证．——青夏教育精英家教�—— sketch template

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轻松学好初中几何：各个击破初中几何问题之《等腰三角形》知乎 sketch template

如图所示已知 ABC和 ECD都是等腰直角三角形∠ACB=∠DCE=90．D为AB边上 点若AB=10cmAD=3cm求AE的长 sketch template

如图所示，用三根轻绳将质量为m的物块悬挂在空中。已知ac和bc与竖直方�的夹角分别为30°和60°，重力加速度为g。请选择合适的研究对象，画出 sketch template

已知如图 ABC是等腰直角三角形∠BAC=90°过点C作BC的垂线l把一个足够大的三角板的直角顶点放到点A处三角板和 ABC在同一 sketch template

15．如图所示已知等腰直角三角形ABC中∠ACB=90°直线L经过点C AD ⊥LBE⊥L垂足分别为DE． 1证明 ACD sketch template

如图所示已知等边三角形ABC的边长为1按图中所示的规律用2011个这样的等边三角形镶嵌而成的四边形的�长是 ．题目和参考答案——青夏 sketch template

1如图1所示在等边 ABC中点D是AB边上的动点以CD为一边�上作等边 EDC连接AE求证AE∥BC中等边 ABC的形状改 sketch template

1如图1所示在等边 ABC中点D是AB边上的动点以CD为一边�上作等边 EDC连接AE求证AE∥BC中等边 ABC的形状改 sketch template

已知等腰三角形的�长为24一腰上的中线把三角形分为两个三角形两个三角形的�长的差是3cm求等腰三角形各边的长．题目和参考答案——青夏 sketch template

如图所示已知DE平行BCEF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

如图所示三角形abc是边长为1的正三角形 三角形bdc是顶角为120度的等腰三角形 以d为顶点做一个60是度的角m 百度知道 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

如图所示侧面是全等的等腰三角形的棱锥是 A正棱锥 B侧棱长相等的棱锥C斜高长相等的棱锥 D以上均不对题目和参考答案——青夏教育精英 sketch template

如图所示，已知AB为圆O的直径，CD是弦，且AB⊥CD于点E，连接AC、OC、BC． sketch template

10．如图所示已知 ABC和 DCE均是等边三角形点BCE在同一条直线上AE与BD交于点OAE与CD交于点GAC与BD交于点F sketch template

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如图所示顶角为36°的等腰三角形其底边与腰之比等于k这样的三角形叫黄�三角形已知腰长AB=1 ABC为第一个黄�三角形 BCD为第 sketch template

如图所示已知 ABC和 DCE都是等边三角形图中的三角形可以通过旋转相互得到的是A ACE和 BCDB ABF和 CFDC ABC sketch template

如图1 已知等腰三角形ABC 则图2所示的四个图中可能是 ABC的直观图的是 1 2 ——青夏教育精英家教�—— sketch template

如图已知 ABC中AB=AC=3BC=2点D是边AB上的动点过点D作DE∥BC交边AC于点E点Q是线段DE上的点且QE=2DQ sketch template

如图所示侧面是全等的等腰三角形的棱锥是 A正棱锥 B侧棱长相等的棱锥C斜高长相等的棱锥 D以上均不对题目和参考答案——青夏教育精英 sketch template

如图所示顶角为36°的等腰三角形其底边与腰之比等于k这样的三角形叫黄�三角形已知腰长AB=1 ABC为第一个黄�三角形 BCD为第 sketch template

如图，图中所有的三角形都是直角三角形，四边形都是正方形．已知正方形A，B，C，D的边长分别是12，16，9，12，求最大正方形E的面积．百度教育 sketch template

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