1 . 如图,装有某种液体的工业用桶中放置有一根搅拌棍.工人师傅为了解桶内所装液体的体积,先在搅拌棍所处桶孔位置做好标记点A,并取出;然后测得搅拌棍接触到液体部分
m,搅拌棍A到底端D处的长度为
,最后测量出桶的高
为
,圆桶内壁的底面直径为
.已知桶内的液面与桶底面平行,其平面示意图如图2所示.请你根据以上数据,帮工人师傅计算出桶内所装液体的体积(结果保留π)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863857a5d6eb825523ce5e4720537be9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d8fef97b2674915e3c690bc69d6614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0bb863aba7910e3ba8452a2c29b347.png)
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2 . 如图,在△ABC中,AB=AC,D是AC边的中点,过A作AE⊥BD于点E,AE的延长线交BC于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/1698ab84-b44e-48ad-a154-ab7856a95516.png?resizew=232)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/a92cf902-982a-471b-a642-b1719450a140.png?resizew=229)
(1)如图1,若AF=CF,求证:AC2=CF⋅BC;
(2)如图1,过点F作FG∥BD交AC于点G,若
,求
的值;
(3)如图2,若∠BAC=90°,求证:BF=2CF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/1698ab84-b44e-48ad-a154-ab7856a95516.png?resizew=232)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/a92cf902-982a-471b-a642-b1719450a140.png?resizew=229)
(1)如图1,若AF=CF,求证:AC2=CF⋅BC;
(2)如图1,过点F作FG∥BD交AC于点G,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9307beadc580f0bacf70ba7f806bab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd01a4cbd347fce1a7414eb9fa73d16.png)
(3)如图2,若∠BAC=90°,求证:BF=2CF.
您最近一年使用:0次
3 . 如图,在△ABC中,AB=AC,D是AC边的中点,过A作AE⊥BD于点E,AE的延长线交BC于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/1698ab84-b44e-48ad-a154-ab7856a95516.png?resizew=232)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/a92cf902-982a-471b-a642-b1719450a140.png?resizew=229)
(1)如图1,若AF=CF,求证:AC2=CF⋅BC;
(2)如图1,过点F作FG∥BD交AC于点G,若
,求
的值;
(3)如图2,若∠BAC=90°,求证:BF=2CF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/1698ab84-b44e-48ad-a154-ab7856a95516.png?resizew=232)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/a92cf902-982a-471b-a642-b1719450a140.png?resizew=229)
(1)如图1,若AF=CF,求证:AC2=CF⋅BC;
(2)如图1,过点F作FG∥BD交AC于点G,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9307beadc580f0bacf70ba7f806bab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd01a4cbd347fce1a7414eb9fa73d16.png)
(3)如图2,若∠BAC=90°,求证:BF=2CF.
您最近一年使用:0次
2022-08-05更新
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123次组卷
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2卷引用:陕西省渭南市富平县2021-2022学年九年级上学期11月月考数学试题