(1)如图1,
中,
,
,
.若
,且
,求
的长;
(2)如图2,已知
.若
边上存在一点M,
边上存在一点N,使得
,且
(其中点M与点B对应),请利用没有刻度的直尺和圆规作出符合条件的线段
.(注:不写作法,保留作图痕迹,对图中涉及到的点用字母进行标注)
![](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/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/262a173a7cf68e06b4be175df69e2b74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da52e9b4e76b7621dca017f940f89cc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f025ff2f1fe138ad879bdc6f56e2df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/25/4e92cd2d-6802-4ff4-88eb-355818a3c551.png?resizew=340)
更新时间:2023-05-20 20:05:01
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图,在
中,
.用直尺和圆规作图:(不写作法,保留作图痕迹.)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/352dca11-14bc-47dd-8aa6-112b8d3360ca.png?resizew=365)
(1)如图①,若点
在边
上,求作平行四边形
,使得点
、
分别在
、
上;
(2)如图②,求作正方形
,使得点
、
、
分别在
、
、
上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/352dca11-14bc-47dd-8aa6-112b8d3360ca.png?resizew=365)
(1)如图①,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af045d2542c40f955a9de356b9b088c4.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图②,求作正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,
,
平分
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/afe5773d-978b-4c07-bc27-8f1c5859c4a2.png?resizew=106)
(1)用尺规作图完成以下基本作图:作
平分
,分别交
,
于点E,O.连接
;(保留作图痕迹,不写作法和结论.)
(2)根据(1)中作图,证明四边形
是菱形,请你补全证明过程.
证明:∵
,
∴
.
又∵
平分
,
∴①________,
∴
,
∴②________,
同理:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ac49caae8e3b8869d19beeff98966e.png)
∴③________,
又∵
即
,
∴四边形
是平行四边形.
∴四边形
是菱形.(④________).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/afe5773d-978b-4c07-bc27-8f1c5859c4a2.png?resizew=106)
(1)用尺规作图完成以下基本作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)根据(1)中作图,证明四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1683873d45d4bc8eadf70ba4ca6d8b.png)
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f90318c1a8d868d69fba0e8ab960bfc.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
∴①________,
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede99e38c14296ad57f7c55bd36faeee.png)
∴②________,
同理:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ac49caae8e3b8869d19beeff98966e.png)
∴③________,
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41f2f95d643629321deb6e905c4f1ed.png)
∴四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1683873d45d4bc8eadf70ba4ca6d8b.png)
∴四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1683873d45d4bc8eadf70ba4ca6d8b.png)
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解答题-作图题
|
适中
(0.65)
【推荐3】在△ABC中,∠ABC=64°,BC≠AB.小华根据下列的作法在△ABC上作图,如图所示.按要求完成下列各小题.
作法:①以点B为圆心,适当长度为半径画弧,交BA于点M,交BC于点N.
②分别以点M,N为圆心、大于
MN的长为半径画弧,两弧交于点O.
③连接BO并延长,交AC于点D.
(1)求∠ABD的度数.
(2)两个香料加工厂(分别是点A和点C)和一个居民区(点B)的位置示意图恰好是△ABC,两个香料加工厂想合资修建一个污水处理厂(P),好将生产所得的污水处理到合格水平再排放.为了不污染居民的生活用水,计划该污水处理厂建设在线段BD的延长线上,并且该污水处理厂与两个香料加工厂的距离相等.请你判断能否找到满足上述条件的污水处理厂的位置?并在图中利用画图说明理由.(保留作图痕迹,不要求写作法)
作法:①以点B为圆心,适当长度为半径画弧,交BA于点M,交BC于点N.
②分别以点M,N为圆心、大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
③连接BO并延长,交AC于点D.
(1)求∠ABD的度数.
(2)两个香料加工厂(分别是点A和点C)和一个居民区(点B)的位置示意图恰好是△ABC,两个香料加工厂想合资修建一个污水处理厂(P),好将生产所得的污水处理到合格水平再排放.为了不污染居民的生活用水,计划该污水处理厂建设在线段BD的延长线上,并且该污水处理厂与两个香料加工厂的距离相等.请你判断能否找到满足上述条件的污水处理厂的位置?并在图中利用画图说明理由.(保留作图痕迹,不要求写作法)
![](https://img.xkw.com/dksih/QBM/2019/11/24/2340651357683712/2341011153141760/STEM/35d1938a2e604959bd9905084f41c7ef.png?resizew=136)
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解答题-作图题
|
适中
(0.65)
【推荐1】如图,在
的方格纸中,每个小正方形的边长为1,已知格点
(顶点均在格点上),请按要求画格点三角形 .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/6212a576-6597-4588-a363-b3a6bca121ad.png?resizew=335)
(1)在图1中画出格点
(顶点均在格点上)关于直线
对称
.
(2)在图2中画一个等腰
,使其
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a96e9c2e2a15130d1d56a1d0e16b72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/6212a576-6597-4588-a363-b3a6bca121ad.png?resizew=335)
(1)在图1中画出格点
![](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/d2df93bd15f25096c510b589aad0dfc1.png)
(2)在图2中画一个等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e005e2d9fe63f766b28a41dd103d72e2.png)
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解答题-证明题
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适中
(0.65)
名校
【推荐2】
ABC是等边三角形,D是三角形外一动点,满足∠ADB=60°;
(1)如图①,当D点在AC的垂直平分线上时,求证:DA+DC=DB;
(2)如图②,当D点不在AC的垂直平分线上时,(1)中的结论是否仍然成立?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(1)如图①,当D点在AC的垂直平分线上时,求证:DA+DC=DB;
(2)如图②,当D点不在AC的垂直平分线上时,(1)中的结论是否仍然成立?请说明理由.
![](https://img.xkw.com/dksih/QBM/2021/7/9/2760621101506560/2795457189134336/STEM/712d10f7f54041588e1eeff7b64f7048.png?resizew=247)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,在
中,
,以
边为直径作
交
于点
,过点
作
于点
,
,
的延长线交于点
.
是
的切线;
(2)若
,且
,求
的半径与线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64e0206b1814c35cc96bd2b6b12239a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5239826fca7bee4cab3a5a486cecb7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,互相垂直的两条公路AM、AN旁有一矩形花园ABCD,其中AB=30米,AD=20米.现欲将其扩建成一个三角形花园APQ,要求P在射线AM上,Q在射线AN上,且PQ经过点C.
(1)DQ=10米时,求△APQ的面积.
(2)当DQ的长为多少米时,△APQ的面积为1600平方米.
(1)DQ=10米时,求△APQ的面积.
(2)当DQ的长为多少米时,△APQ的面积为1600平方米.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/24/396fa149-2cd5-4a58-a8b7-b5143cbf1390.png?resizew=144)
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解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,在矩形
中,
,
,点
沿
边从点
开始向点
以每秒1个单位长度的速度运动;点
沿
边从点
开始向点
以每秒2个单位长度的速度运动.如果
同时出发,用
秒表示运动的时间.请解答下列问题:
![](https://img.xkw.com/dksih/QBM/2020/9/24/2556780884819968/2557573975851008/STEM/ddb4f5969c7c4d1e88ccc5c1427b2336.png?resizew=183)
(1)当
为何值时,
;
(2)当
为何值时,以点
为顶点的三角形与
相似?
(3)在运动过程中,
的面积是否存在最小值?若存在,求出最小值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7523a8c4f99e7fe1368a491160b8c54.png)
![](https://img.xkw.com/dksih/QBM/2020/9/24/2556780884819968/2557573975851008/STEM/ddb4f5969c7c4d1e88ccc5c1427b2336.png?resizew=183)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68f71476e365d4c354bd1f6963d1065.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c145957fbd3fe95afceb16ad9e6744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417d8c68aac736fa56f7fc6f6c8a07cd.png)
(3)在运动过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f201a40fedca4ad14db193f4db2127e.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,在△ABC中,AB=AC,AD平分∠BAC,DE⊥AB于点E.
![](https://img.xkw.com/dksih/QBM/2019/12/25/2362563421102080/2363265083621376/STEM/0525424a3f354aee8151bb41288dedb1.png?resizew=117)
(1)求证:△BDE∽△CAD;
(2)若AB=13,AD=12,求线段AE的长.
![](https://img.xkw.com/dksih/QBM/2019/12/25/2362563421102080/2363265083621376/STEM/0525424a3f354aee8151bb41288dedb1.png?resizew=117)
(1)求证:△BDE∽△CAD;
(2)若AB=13,AD=12,求线段AE的长.
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