有一组平行线
,过点
作
于
,作
,且
,过点
作
交直线
于点
,在直线
上取点
使
,则
为________ 三角形,若直线
与
间的距离为2,
与
间的距离为5,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae248960d8c1677cf948f8251275e863.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64543efe90f8bbe11e8544eacd4614b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc8975ec17123f634bf36954f783b8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78cf13bc6e231c6b85389be45fa9f40c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2934239d4275870e77994feb6af6594e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf596f563981fb69aa0334c8b6915ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdc9f4a99b567a6ee4be3943beeddca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae248960d8c1677cf948f8251275e863.png)
![](https://img.xkw.com/dksih/QBM/2020/3/12/2417896540069888/2417961336676352/STEM/826a10c5f78d442f9d40616c5c102fa4.png?resizew=174)
19-20八年级上·浙江杭州·期末 查看更多[1]
(已下线)【新东方】初中数学720【2019年】【初二上】
更新时间:2020-04-01 02:40:44
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【推荐1】如图是屋架设计图的一部分,点
是斜梁
的中点,立柱
、
垂直于横梁
,
,
,立柱
长为______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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【推荐2】在
ABC中,已知∠A、∠B、∠C的度数之比为1:2:3,AB边上的中线长为4cm,则
ABC面积等于______ cm2.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
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【推荐1】如图,在矩形ABCD中,BD是对角线,AE⊥BD,垂足为E,连接CE,若
,则tan∠DEC的值是________ .
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【推荐2】一副三角板记作
和
,已知
,
,
,
,将它们叠合在一起,使边
与
重合(如图1),O是边
的中点,再将
绕点
顺时针旋转
(如图2),
与
相交于点
,则
的长是______ .在上述旋转过程中,线段
扫过的区域的面积是______ .
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