一透明的敞口正方体容器
装有一些液体,棱
始终在水平桌面上,容器底部的倾斜角为
(
,如图所示).
探究:如图,液面刚好过棱
,并与棱
交于点Q,此时液体的形状为直三棱柱,其三视图及尺寸如图所示.
解决问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/d4b6d8c9-436d-4e8f-8c9b-898226d2adb3.png?resizew=387)
(1)
与
的位置关系是_____,
的长是______
;
(2)求液体的体积(直三棱柱的体积
底面三角形的面积
高);
(3)求
的度数.(注:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99af4d566d900f632c9e78e7e916fe4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08785db43fe459d2d53576ce54ef775.png)
探究:如图,液面刚好过棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed7bc83ebd009c5a7f58116eb8f5d8f.png)
解决问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/d4b6d8c9-436d-4e8f-8c9b-898226d2adb3.png?resizew=387)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af089fd292ba69ddef79e9ab1cac77ca.png)
(2)求液体的体积(直三棱柱的体积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468403b3eba9e40bfa36f464e927738.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e764f1f501ec270d1df7d60cbce97f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2460de244598fb1f3de496330eaec133.png)
更新时间:2023-12-10 19:05:51
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】(1)用直尺和圆规作一个等腰三角形
,使得底边
长为线段
,底边上的高线
的长为线段
,要求保留作图痕迹.(不要求写出作法)
(2)在(1)中,若
,求等腰三角形的腰长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)在(1)中,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/188f3da12b1958eef5ebc8f7674f5d26.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/13/d295bda0-4e66-4c0f-882f-4b76d935c8f5.png?resizew=127)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,在菱形
中,
,
,以点
为顶点的一个
的角
绕点
旋转,
的两边分别交射线
,射线
于点
,
,且
,
不与
,
,
重合,连接
.
![](https://img.xkw.com/dksih/QBM/2021/7/6/2758409074892800/2817301431410688/STEM/26061ac0724d423288e267b57f484bd6.png?resizew=521)
(1)如图1,当点
是线段
的中点时,则
__________.
(2)在
转动的过程中,
的形状是否会发生改变?如果不会发生改变,请判断形状,并结合图2说明理由.
(3)如图3,当点
在线段
的延长线上,且
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/2021/7/6/2758409074892800/2817301431410688/STEM/26061ac0724d423288e267b57f484bd6.png?resizew=521)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
(3)如图3,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adb34acf4ee03bf3f3801ab644a0e209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
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解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,在
中,以
为直径作半圆O交
于点D,且D是
的中点,过点D作
于点E,交
的延长线于点F.
是
的切线;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801ecfc13745aca266b769f53e14a810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5e973904cc6a511b205a993f07ae41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,以
为直径的
外接于
,过
点的切线
与
的延长线交于点
的平分线分别交
于点
,其中
的长是一元二次方程
的两个实数根.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/e24b9410-d155-4f0c-9bd1-2ee224a34a1b.png?resizew=169)
(1)求证:
;
(2)若线段
上存在一点
,使得四边形
是菱形,请求出菱形面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/69c9b902d7f404dadba27b24e7efff44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dc62e10004e73908091338362917da.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/e24b9410-d155-4f0c-9bd1-2ee224a34a1b.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98bec24bcb8ec07b38da1ccbb402bf6d.png)
(2)若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78bf7adfcd680efff79823e6c6176d0.png)
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解答题-问答题
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适中
(0.65)
【推荐1】下列给出了某种工件的三视图,某工厂要铸造5000件这种铁质工件,要用去多少生铁?工件铸成后,表面需得涂一层防锈漆,已知1 kg防锈漆可以涂4 m2的铁器面,涂完这批工件要用多少防锈漆?(铁的比重为7.8 g/cm3)
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解答题-作图题
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适中
(0.65)
【推荐2】用若干个棱长为1cm的小正方体搭成如图所示的几何体.
(1)这个几何体的体积为 cm3.
(2)请在方格纸中用实线画出该几何体的主视图,左视图,俯视图.
(3)这个几何体的表面积为 cm2.
(1)这个几何体的体积为 cm3.
(2)请在方格纸中用实线画出该几何体的主视图,左视图,俯视图.
(3)这个几何体的表面积为 cm2.
![](https://img.xkw.com/dksih/QBM/2021/5/14/2721099431895040/2721618679021568/STEM/a91e0a26-6364-40f0-8de9-8ceac20d7e39.png)
您最近一年使用:0次