如图,在
中,
是
的中点,
,
,垂足分别是
、
,
.
(1)图中几对全等的三角形,请一一列出;
(2)求证
平分
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/a5784a5d-02e2-4329-a434-d089c0f819dd.png?resizew=95)
(1)图中几对全等的三角形,请一一列出;
(2)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
更新时间:2023-12-14 14:16:48
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,四边形
中,
连接
并延长交
的延长线于点
,连接
;
(1)求证:
;
(2)若
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef3b2c4efd036d9b08d29f79826039f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/30/f4061550-24d0-49a4-81a5-df8b964211d7.png?resizew=149)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5687e49fe4b778c07f1ebe899a9f291.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d498c5bd6f0bc27ab2ebd2c003c666.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c5d39051eb2ed078534d57c20fa0d37.png)
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解答题-问答题
|
适中
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【推荐2】在
中,
,点D是射线
上的动点,连接
,以
为腰作等腰
,使
,且
在
上方,
,连接
:
![](https://img.xkw.com/dksih/QBM/2020/11/20/2601236484784128/2608310691250176/STEM/eea826d7-1a61-4ce6-981c-e93fd6b6a284.png)
(1)如图1,若
,过点D作DF//AB交
于点F,则
_______度;
(2)如图2,若
,判断
与
的大小关系?并说明理由!
(3)如图3,若
为等边三角形,
,当
是直角三角形时,直接写出
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce25e95729c34d26e482512d36dd89b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b0af6e3a923d57074531202b480f1ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/2020/11/20/2601236484784128/2608310691250176/STEM/eea826d7-1a61-4ce6-981c-e93fd6b6a284.png)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3854ed7f23021060b9d59ee16dc759eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b753dbb5a670dd4f5e23bb919e44dda2.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3caf8b48261a32bb2c12a770f7d94d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db866ecc0c098bfc32ec8a43b65bdd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df3b2901ad26337818f75e81448ebb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图,已知
.请按步骤用尺规作图,并回答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/bae17fd6-38c8-4ccf-9372-e2a8d6198f57.png?resizew=196)
第一步:在
,
上分别截取
,
,使
.
第二步:分别以点D和点E为圆心,以大于
长为半径作弧,两弧在
内交于点C.
第三步:作射线
.(保留作图痕迹)
(1)射线
是_______________________.
(2)连接
,
,
与
全等吗?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/bae17fd6-38c8-4ccf-9372-e2a8d6198f57.png?resizew=196)
第一步:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870db8090d5c4d194c25cf1355968f29.png)
第二步:分别以点D和点E为圆心,以大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65026a6b6402cb599e14be8023a3f6a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
第三步:作射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
(1)射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e72a855bb6d80737099e412ed52a26b.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】由边长为1的小正方形构成网格,每个小正方形的顶点叫做格点,点A、B、C、D都是格点,仅用无刻度的直尺在给定12×8的网格中画图,画图过程用虚线表示,画图结果用实线表示,按要求完成下列问题:
![](https://img.xkw.com/dksih/QBM/2021/4/8/2695165198008320/2697581662347264/STEM/10fc9544-52a9-4447-9580-92e392406a8e.png)
(1)平移线段AC得到线段DE,在图1中画出线段DE;
(2)点F在线段BC上,使△ABF的面积等于△ACF面积的2倍,在图1中画出线段AF;
(3)点M在线段AD上,使tan∠ABM=
,在图2中画出线段BM.
![](https://img.xkw.com/dksih/QBM/2021/4/8/2695165198008320/2697581662347264/STEM/10fc9544-52a9-4447-9580-92e392406a8e.png)
(1)平移线段AC得到线段DE,在图1中画出线段DE;
(2)点F在线段BC上,使△ABF的面积等于△ACF面积的2倍,在图1中画出线段AF;
(3)点M在线段AD上,使tan∠ABM=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,在
中,点
、
在边
上,
,
,垂足为
,
,垂足为
,
与
交于点
,且
.
![](https://img.xkw.com/dksih/QBM/2020/11/11/2590564564615168/2605359084568576/STEM/e8faecec45274374a844c06a414338b3.png?resizew=190)
(1)求证:
;
(2)连接
,并延长
交
于点
,求证:过点
、
的直线垂直平分线段
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba870ac7e456d8daa098c9d52aeccc2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb3ef376679d179c6ff2a1c0a3632b53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a7847bff0073127f10ec3925127414.png)
![](https://img.xkw.com/dksih/QBM/2020/11/11/2590564564615168/2605359084568576/STEM/e8faecec45274374a844c06a414338b3.png?resizew=190)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374e2198b495b86b0f8308d28035a3db.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
解答题-证明题
|
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名校
【推荐2】【教材呈现】下图是华师版八年级上册数学教材第96页的部分内容.
3.角平分线
回忆
我们已经知道角是轴对称图形,角平分线所在的直线是角的对称轴,如下图所示,
是
的平分线,P是
上任一点,作
,
,垂足分别为点D和点E,将
沿
对折,我们发现
与
完全重合,由此即有:
角平分线的性质定理角平分线上的点到角两边的距离相等.
已知:如下图所示,
是
的平分线,P是
上任一点,作
,
,垂足分别为点D和点E.
求证:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/41821860-a9ee-4b02-900b-d1a4d2ec2bab.png?resizew=179)
分析:图中有两个直角三角形
和
,只要证明这两个三角形全等,便可证得
.
(1)请根据教材内容,结合上图,补全定理的证明过程.
(2)【应用】如图1,在
中,
,
平分
,
于点E,点F在
上,
,若
,
,则
的长为______.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/2c3ca344-31f8-4e81-9274-2a662e836ac0.png?resizew=151)
(3)【拓展】如图2,在
中,
平分
交
于点D,
于点E.若
,
,
,
,则
的面积为______.
3.角平分线
回忆
我们已经知道角是轴对称图形,角平分线所在的直线是角的对称轴,如下图所示,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3224457d394d71df7d2955be6149dea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c70aa83794b41e477e7b546ecbe435ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
角平分线的性质定理角平分线上的点到角两边的距离相等.
已知:如下图所示,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3224457d394d71df7d2955be6149dea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c70aa83794b41e477e7b546ecbe435ed.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374e2198b495b86b0f8308d28035a3db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/41821860-a9ee-4b02-900b-d1a4d2ec2bab.png?resizew=179)
分析:图中有两个直角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bdac31e82ed00eace31e8c075c97bb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e26e65f15f56505cea3672e8cd3648c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374e2198b495b86b0f8308d28035a3db.png)
(1)请根据教材内容,结合上图,补全定理的证明过程.
(2)【应用】如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b9f98fe35d1baada6fa249d117363e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f25936291abb6432ed5a710ebf0ea195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21fe7f306533f388843ff62fa2b5251a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/2c3ca344-31f8-4e81-9274-2a662e836ac0.png?resizew=151)
(3)【拓展】如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b173ac8cc4ac4f1c9e1daaa605fbb27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6370d6c626bdabf1fc694501ee6c714f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/cee73dc5-5ea0-47bc-adfe-8fc293db3f29.png?resizew=210)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,
,
的平分线与
的外角平分线交于点
,过点
作
于
.
(1)如图
,若
,求
的度数;
(2)如图
,连
,求证:
平分
;
(3)如图
,若
周长为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/ad3400c8-c3db-4483-92d9-4390e049c2d5.png?resizew=367)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ebf11c2d7466ef937bbff2899f5c86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bab53e0cb6e6ec13764e326b98f26b6.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知:如图∠BAC的角平分线AD与BC的垂直平分线DN交与点D,DE⊥AB ,DF⊥AC ,垂足分别为E,F.
(1)求证:BE=CF.
(2)若△ABD的面积为10cm2,△ACD的面积为6cm2,求△CDF的面积.
(1)求证:BE=CF.
(2)若△ABD的面积为10cm2,△ACD的面积为6cm2,求△CDF的面积.
![](https://img.xkw.com/dksih/QBM/2021/10/13/2828303766216704/2831513609838592/STEM/f7bbf710-f96c-4fc5-826d-ea1fe0ff945c.png)
您最近一年使用:0次