已知:如图1,
中,
,
,动点P从点C出发沿线段
以
的速度向点B运动,同时动点Q从点B出发沿线段
以
的速度向点A运动,当其中一个动点停止运动时另一个动点也随之停止,设运动时间为t
,以点Q为圆心,
长为半径的圆Q与射线
、线段
分别交于点D、E.
尝试:当
是等腰三角形时,求t的值;
探究:设
,求
与t的函数解析式,且写出t的取值范围;
拓展:如图2,连接
,当t为何值时,线段
与
相切?
延伸:如图2,若
与线段
只有一个公共点,求t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011586f46c6f0c37d0f2e85fb69bb4c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9d0d90bf492735a174a88df5704f92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc2d9b900111188aca83126dff97f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42670ba76f7d6667851b86772eec24f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c34fb6c0a25aca680a1bec273244cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
尝试:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
探究:设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e83115ca0edf2fedb181bb960f3efde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
拓展:如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
延伸:如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/1/bc0906d3-1a8e-4fc7-b02a-390a53788252.png?resizew=387)
更新时间:2023-08-30 19:31:41
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】在平面直角坐标系中,点
,
,且
,
满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/28/64074928-2360-4fbf-838c-83134c97c151.png?resizew=283)
(1)
_________,
________.
(2)连接
,
为
内一点,
.
①如图1,过点
作
,且
,连接
,并延长交
于
.求证:点
为线段
的中点;
②如图2,点
在
的延长线上,连接
、
.若
,点
,求:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4b9486ec9dca95979803bf91ca6c337.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa6e5a12543f954be1a6057c6b2ed51.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/3abc8118daf443a4d88d33766fa34fa6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/28/64074928-2360-4fbf-838c-83134c97c151.png?resizew=283)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a56ef133b5569cf99b8cb8c6f9d39e.png)
①如图1,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/026ec361327730d3c614a6f25b9b994f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f0680d9a98170fb1f47e22c15bac495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3268508a2211f6043af1f9233beb0411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/781602348a6521f0d68e1b6e49c6bd6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7051f87f98ce95dd93e9b3eb288cd322.png)
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解题方法
【推荐2】如图,
是
的内接三角形,点
在射线
上,连接
,
.
(1)如图1,若
经过圆心
,求证:
;
(2)如图2,若
不经过圆心
,连接
,求证:
;
(3)如图3,在(2)的条件下,连接
交
于点
,延长
交
于点
,交
于点
,若
,
,
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc13fe21e64d9b45614ed43be847904.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/12/a60d1c3e-b0ae-4950-ba6a-b378487a9c99.png?resizew=300)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d628a4303074527a855fac1ebc186b.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075d02bb48cdaf700af73721a55f7664.png)
(3)如图3,在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc93e193fad261689949a52819753f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62cab5a0c23babb8a7c9b426c8d9644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4c6b0869d7248b6c2f964718a67702.png)
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解答题-问答题
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(0.4)
名校
【推荐3】如图1,四边形ABCD是正方形,动点P从点A出发,以2cm/s的速度沿边AB、BC、CD匀速运动到D终止;动点Q从A出发,以1cm/s的速度沿边AD匀速运动到D终止,若P、Q两点同时出发,运动时间为ts,△APQ的面积为Scm2.S与t之间函数关系的图象如图2所示.
(1)求图2中线段FG所表示的函数关系式;
(2)当动点P在边AB运动的过程中,若以C、P、Q为顶点的三角形是等腰三角形,求t的值;
(3)是否存在这样的t,使PQ将正方形ABCD的面积恰好分成1:3的两部分?若存在,求出这样的t的值;若不存在,请说明理由.
(1)求图2中线段FG所表示的函数关系式;
(2)当动点P在边AB运动的过程中,若以C、P、Q为顶点的三角形是等腰三角形,求t的值;
(3)是否存在这样的t,使PQ将正方形ABCD的面积恰好分成1:3的两部分?若存在,求出这样的t的值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/7a422410-a91a-4d32-875f-77343babb2ba.png?resizew=553)
您最近一年使用:0次
解答题-证明题
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较难
(0.4)
【推荐1】如图1:在
中,
,D为
边上一点(不与点B,C重合),将线段
绕点A逆时针旋转
,得到线段
,连接
,
.
(1)求证:
;
(2)直接写出线段
,
,
之间满足的等量关系;
(3)如图2,在
中,
,D为
外的一点,且
,线段
,
,
之间满足的等量关系又是如何的,请证明你的结论;
(4)如图3,已知
是
的直径,点C,D是
上的点,且
.填空:
①若
,
,则弦
的长为 ;
②若
,则当
的值最大时,
的半径为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/16ac2f1e-ee0a-4295-9a01-9d92d858b514.png?resizew=435)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eba7e2cb2e2390673b83bde332973d6.png)
(2)直接写出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ab46164b23af7a4c4907f176e392ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(4)如图3,已知
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ab46164b23af7a4c4907f176e392ec.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71e6ea7333dbc78d0a7b9bc3892f940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93d3ec8241c5f4bf4adf27a3e5a89df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3925e5ab8349fb7cb81499e928beb54a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】在正方形ABCD中,点E在边BC上,连AE.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/b83099a4-4abf-4cf4-a16f-1b41ac20145f.png?resizew=601)
(1)如图1,若
,AB=4,求EC长;
(2)如图2,点F在对角线AC上,满足AF=AB,过点F作FG⊥AC交CD于G,点H在线段FG上(不与端点重合),连接AH.若∠EAH=45°,求证:
;
(3)如图3,在(1)的条件下,点G是AD中点,点H是直线CD上的一动点,连GH,将
DGH沿着GH翻折得到
PGH,连PB交AE于Q,连PA、PD,当
取最小值时,请直接写出
PAD的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/b83099a4-4abf-4cf4-a16f-1b41ac20145f.png?resizew=601)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/956c0ba1720c475d14bf585225f155b9.png)
(2)如图2,点F在对角线AC上,满足AF=AB,过点F作FG⊥AC交CD于G,点H在线段FG上(不与端点重合),连接AH.若∠EAH=45°,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d545045072bf94cd4eae66f4a7e3f093.png)
(3)如图3,在(1)的条件下,点G是AD中点,点H是直线CD上的一动点,连GH,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b9d64d8a012aae5af874a41385044b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
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解答题-问答题
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较难
(0.4)
解题方法
【推荐1】如图1,已知点A、O在直线l上,且,
于O点,且
,以OD为直径在OD的左侧作半圆E,
于A,且
.向右沿直线l平移
得到
,设平移距离为x.
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79fccaefeefaf943571aee87c4ed5b1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c91862f9c9f67715c6758f2ad0373c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb60036876b3c5aa09bb9570e57328b.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79fccaefeefaf943571aee87c4ed5b1e.png)
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解答题-问答题
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【推荐2】如图,在
中,
,点D在
上,
,动点Q从A点出发沿线段
以每秒1单位的速度运动,过点Q作
,交射线
于点P,点P关于点D的对称点为
,以
为边在
上方作正方形
,设点Q运动的时间为t秒
.
![](https://img.xkw.com/dksih/QBM/2023/5/5/3231039777128448/3233245355999232/STEM/915e6e92d5a148f5b7d4331431713082.png?resizew=443)
(1)当点P在线段
上时, 求
的长(用t的代数式表示).
(2)当正方形
的顶点F或E刚好落在
的
的边上时,求t的值.
(3)以
为直径作
,当
与
的边所在的直线相切时,请求出所有满足条件的t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f13fcb99389931b27bf85821b97ff71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b154270249b0ef54ddb26137b2681a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a99e1ad0d6fb0f13be56d09086366c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5c16f1023a7c69bb6113bd38c1aa1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bd4fcfaf70e3714472bda638d3deff4.png)
![](https://img.xkw.com/dksih/QBM/2023/5/5/3231039777128448/3233245355999232/STEM/915e6e92d5a148f5b7d4331431713082.png?resizew=443)
(1)当点P在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(2)当正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5c16f1023a7c69bb6113bd38c1aa1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在
中,
,点D,E分别在边
,
上,连接
,
交于点G,且
.
![](https://img.xkw.com/dksih/QBM/2023/1/20/3156977562345472/3160644195385344/STEM/9652989c282940babeaaea6783552d68.png?resizew=220)
(1)如果
,求证:
;
(2)如果射线
交
于点P,且
,求证:点P是
中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://img.xkw.com/dksih/QBM/2023/1/20/3156977562345472/3160644195385344/STEM/9652989c282940babeaaea6783552d68.png?resizew=220)
(1)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e92f48e9bfe12d145f7d2a2f0360d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e92d0de30bc802882fe6b04b00b92239.png)
(2)如果射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c543c3027ea9499a8e2aba044604708.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
【推荐2】如图,在
中,
,
,
.动点P从点A出发,沿AB以每秒4个单位长度的速度向终点B运动.过点P作
交AC或BC于点Q,分别过点P、Q作AC、AB的平行线交于点M.设
与
重叠部分的面积为S,点P运动的时间为
秒.
![](https://img.xkw.com/dksih/QBM/2021/12/27/2881534821359616/2888489608224768/STEM/2d12ea0f-c46f-4f31-bdf7-738438eb7e89.png?resizew=231)
(1)当点Q在AC上时,CQ的长为______(用含t的代数式表示).
(2)当点M落在BC上时,求t的值.
(3)当
与
的重合部分为三角形时,求S与t之间的函数关系式.
(4)点N为PM中点,直接写出点N到
的两个顶点的距离相等时t的值.
![](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/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99675fa03da205c4499967c9d908412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf4b43b6792b9ae78a1c8cae4e60524.png)
![](https://img.xkw.com/dksih/QBM/2021/12/27/2881534821359616/2888489608224768/STEM/2d12ea0f-c46f-4f31-bdf7-738438eb7e89.png?resizew=231)
(1)当点Q在AC上时,CQ的长为______(用含t的代数式表示).
(2)当点M落在BC上时,求t的值.
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99675fa03da205c4499967c9d908412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(4)点N为PM中点,直接写出点N到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次