如图三角形abc的面积为1de分别为abac的中点fg是bc边上的三等分点．求三角形def和三角形doe的面积．题目和参考答案 Sketch Coloring Page

如图三角形abc的面积为1de分别为abac的中点fg是bc边上的三等分点．求三角形def和三角形doe的面积．题目和参考答案 Template

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tomski如图三角形abc的面积为1de分别为abac的中点fg是bc边上的三等分点．求三角形def和三角形doe的面积．题目和参考答案 coloring

初中经典几何题，如图，求三角形ABC的面积 哔哩哔哩 Bilibili sketch template

在 ABC中DEFG分别是三等分点 ABC面积为1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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三角形ABC的面积为1DE分别为ABAC的中点FG是BC边上的三等分点．求三角形DEF和三角形DOE的面积． 题目和参考答案 sketch template

【题文�如图， ABC的面积为1，第一次操作：分别延长AB，BC，CA，至点A1，B1，C1，使A1B=AB，B1C=2BC，C1A=2CA sketch template

如图把三角形DEF的各边�外延长1倍后得到三角形ABC三角形ABC的面积为1．三角形DEF的面积是多� 题目和参考答案——青夏教育精英家教�—— sketch template

如图，三角形ABC各边的三等分点分别是D、EF若三角形ABC的面积是210平方厘米，则阴影部分的面积是 平方厘米百度教育 sketch template

如图三角形ABC的面积为1BDDC=21E为AC的中点AD与BE相交于P那么四边形PDCE的面积为 ． 题目和参考答案——青夏 sketch template

如图所示已知三角形ABC中∠BAC为钝角． 1画出点C到AB的垂线段 2过A点画BC的垂线 3点B到AC的距离是多� sketch template

如图已知正三角形ABC的边长为1EFG分别是ABBCCA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所示三角形ABC中BD=2DCAF=FDBF=3FE AEF的面积是1cm2求 ABC的面积． 题目和参考答案——青夏教育精英 sketch template

百度教育 sketch template

有意思的几何题（4）知乎 sketch template

如图，已知BD＝DC，EC＝2AE，三角形ABC的面积是30，求阴影部分面积。百度教育 sketch template

如图已知三角形ABC的面积为2平方厘米延长AB至D使AD＝3AB延长BC至E使BE＝4BC延长CA至F使CF＝2CA．求三角形 sketch template

题目1如图1 ABC中D是BC边上一点则 BD与 ADC有一个相同的高它们的面积之比等于相应的底之比记为= ABD sketch template

下图中三角形ABC的面积是12平方厘米．并且BE=2ECF是CD的中点．那么阴影部分的面积是55平方厘米． 题目和参考答案——青夏教育精英 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已知三角形ABC的面积是15平方厘米BDDC=ADED=21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所示三角形ABC的面积为1cm2．AP垂直∠B的平分线BP于P．则与三角形PBC的面积相等的长方形是 ABCD 题目和参考 sketch template

如图所示三角形ABC中点XYZ分别在线段AZBXCY上且YZ=2ZCZX=3XAXY=4YB三角形XYZ的面积等于24求 sketch template

如图等边三角形ABC中DE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

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在钝角三角形ABC中M为AB边的中点MDEC都垂直于BC边．若三角形BDE的面积是3平方厘米则三角形ABC的面积是多� 题目和 sketch template

如图在三角形ABC中BDDC=12E为AD的中点若三角形ABC的面积为120平方厘米则阴影部分的面积是多�平方厘米 题目和参考 sketch template

如图 ABC是面积为a的等边三角形AD是BC边上的高点EF是AD上的两点．则图中阴影部分的面积为 ． 题目和参考答案——青夏教育精英家教�—— sketch template

百度教育 sketch template

已知如图以Rt ABC的三边为斜边分别�外作等腰直角三角形．若斜边AB＝3则图中阴影部分的面积为 ．——青夏教育精英家教�—— sketch template

如果一个三角形的三条中线分别是3，4，5，求这个三角形的面积？知乎 sketch template

如图AB两点都是三角形的边的中点如果整个三角形的面积是124cm2那么图中阴影部分的面积是多� 题目和参考答案——青夏教育精英家教�—— sketch template

题目如图在直线l上�放着三个三角形 ABC HFG DCE已知BC=CEFG分别是BCCE的中点FM∥AC∥HG∥DE 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

题目定义三角形三条内角平分线的交点叫做三角形的内心性质内心到三角形三边的距离相等如图1点 为 的内心于于E 则 sketch template

如图 ABC的面积为1DEFG分别是BCAC上的三等分点求阴影四边形PQED的面积． 题目和参考答案——青夏教育精英家教�—— sketch template

如图点DEF分别在等边三角形ABC的边ABBCCA的延长线上且BD=CE=AF说明 DEF为等边三角形． 题目和参考答案——青夏 sketch template

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