在矩形
中,
,
,
是
边上一点,
交
于点
,过点
作
,交射线
于点
,交射线
于点
.
(1)如图
,当点
与点
重合时,求
的长.
![](https://img.xkw.com/dksih/QBM/2021/1/4/2629046874521600/2631888473341952/STEM/c53d53909e174ed2911ffdfde512ac18.png?resizew=150)
(2)如图
,当点
在线段
上时,设
,
,求
与
之间的函数关系式,并写出它的定义域.
![](https://img.xkw.com/dksih/QBM/2021/1/4/2629046874521600/2631888473341952/STEM/e0b99ad5f9814da2b6969a7b44da037d.png?resizew=143)
(3)连接
,当
与
相似时,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40fe2cc764de5fa58e9d90d750c5c528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/7c39d5e0527c067b430e0d8e3d9cfe8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.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/2021/1/4/2629046874521600/2631888473341952/STEM/c53d53909e174ed2911ffdfde512ac18.png?resizew=150)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c29bf5a05dd46f6e03dfd22c32f7ce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d344d1d8d50b416699972561f28c1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2021/1/4/2629046874521600/2631888473341952/STEM/e0b99ad5f9814da2b6969a7b44da037d.png?resizew=143)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41156b57b5ef0e9f8da1f8f12d9a350f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80651f797ab9dccfd7163c605b091ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://img.xkw.com/dksih/QBM/2021/1/4/2629046874521600/2631888473341952/STEM/78235b23875548a482d2ce01cceba69a.png?resizew=128)
更新时间:2021-01-08 20:53:43
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在
中,
,
,
.动点P从点A出发,沿AB以每秒2个单位长度的速度向终点B运动.过点P作
于点D(点P不与点A、B重合),作
,边PQ交射线DC于点Q.设点P的运动时间为t秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/b5949d46-1640-4c4d-953f-4393733fe4fe.png?resizew=319)
(1)用含t的式子表示线段DC的长,并写出解题过程;
(2)当点Q与点C重合时,求t的值.
(3)令线段CQ的长度为L,请直接写出L与t之间的函数关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2951b9f77413d5f062acb300b09de1f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7b05323a261f198e922fee329fd1295.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/b5949d46-1640-4c4d-953f-4393733fe4fe.png?resizew=319)
(1)用含t的式子表示线段DC的长,并写出解题过程;
(2)当点Q与点C重合时,求t的值.
(3)令线段CQ的长度为L,请直接写出L与t之间的函数关系式.
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【推荐2】如图所示,
是等腰直角三角形,
是斜边
的中线,
分别是
边上的动点,且
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/0be03204-b118-4dab-8294-a6315134da7d.png?resizew=145)
(1)求证:
(2)若
.求线段
的长.
(3)若
的面积为
,写出
与
的关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca2b6d907ac44f71bb2c7bb20fd9513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242b88a92c3f78aab24d2cc6944c53ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae1210a744ae636419de68a525faf28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3efffb3e6a571832b723b3c5795b8e8c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/0be03204-b118-4dab-8294-a6315134da7d.png?resizew=145)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97075fe3c2a105f5d2d0a27a9f2b3410.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a6c8ca352ac8ab3b971e77ed1c743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/756edec0d1c373ec7e8fbf0e838f5e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐1】如图,
中,
,
,
,动点P从点B出发,在
边上以每秒
的速度向点A匀速运动,同时动点Q从点C出发,在
边上以每秒
的速度向点B匀速运动,运动时间为t秒
,连接
.
(1)若
与
相似,求t的值;
(2)连接
、
,若
,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafddfd80f69337909f6eac0f0dbfd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432043f79e122f291c47453013042704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a9eed64d225267a58cd001db67e2a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23c77f28566edddf4c3a8c15b3eee12a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/25/18d63dbb-fb8a-48f0-a79c-68169c5a762f.png?resizew=223)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e36eaad3857bcaa452133b271c9cf56.png)
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解答题-证明题
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适中
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【推荐2】如图所示,在矩形MBCN中,点A是边MN的中点,
,
.点D由点A出发沿AB方向向点B匀速运动,同时点E由点B出发沿BC方向向点C匀速运动,它们的速度均为1cm/s.连接DE,设运动时间为
,解答下列问题:
(1)求证:
;
(2)当t为何值时,
的面积为7.5cm2;
(3)在点D,E的运动中,是否存在时间t,使得
与
相似?若存在,请求出对应的时间t;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29bffa30cb73035773e28bd5b3351b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9d0d90bf492735a174a88df5704f92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc4370a74718e86fc4e8dd7a8a1907cf.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b71e0ef1925dfbd5652644274b3a52c.png)
(2)当t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
(3)在点D,E的运动中,是否存在时间t,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2020/11/12/2591298524102656/2596367332368384/STEM/3163a16886d4477e9f39f44afa2eb63f.png?resizew=223)
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【推荐3】如图1,P为∠MON平分线OC上一点,以P为顶点的∠APB两边分别与射线OM和ON交于A. B两点,如果∠APB在绕点P旋转时始终满足OA⋅OB=OP
,我们就把∠APB叫做∠MON的关联角.
![](https://img.xkw.com/dksih/QBM/2019/8/19/2272217337176064/2272914149179392/STEM/fd6f472f8a1b47a8a67e8ee7a8dfbe31.png?resizew=272)
(1)如图2,P为∠MON平分线OC上一点,过P作PB⊥ON于B,AP⊥OC于P,那么∠APB ∠MON的关联角(填“是”或“不是”).
(2)①如图3,如果∠MON=60°,OP=2,∠APB是∠MON的关联角,连接AB,求△AOB的面积和∠APB的度数;
②如果∠MON=α°(0°<α°<90°),OP=m,∠APB是∠MON的关联角,直接用含有α和m的代数式表示△AOB的面积.
(3)如图4,点C是函数y=
(x>0)图象上一个动点,过点C的直线CD分别交x轴和y轴于A,B两点,且满足BC=2CA,直接写出∠AOB的关联角∠APB的顶点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921ef5abce73648e3834140df9a72aa8.png)
![](https://img.xkw.com/dksih/QBM/2019/8/19/2272217337176064/2272914149179392/STEM/fd6f472f8a1b47a8a67e8ee7a8dfbe31.png?resizew=272)
(1)如图2,P为∠MON平分线OC上一点,过P作PB⊥ON于B,AP⊥OC于P,那么∠APB ∠MON的关联角(填“是”或“不是”).
(2)①如图3,如果∠MON=60°,OP=2,∠APB是∠MON的关联角,连接AB,求△AOB的面积和∠APB的度数;
②如果∠MON=α°(0°<α°<90°),OP=m,∠APB是∠MON的关联角,直接用含有α和m的代数式表示△AOB的面积.
(3)如图4,点C是函数y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c943d7b6ce65c70e98d62e3664168ab.png)
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