请根据素材,完成任务.
素材一 | 如图,在![]() ![]() ![]() ![]() | ![]() |
素材二 | 如图,在![]() ![]() ![]() ![]() ![]() ![]() ![]() | ![]() |
素材三 | 如图,矩形![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | ![]() |
任务一 | 若素材一中的![]() ![]() | |
任务二 | 若素材二中的![]() ![]() | |
任务三 | 若任务二中的![]() ![]() ![]() | ![]() |
任务四 | 若任务二中的![]() ![]() ![]() ![]() ![]() | |
任务五 | 当素材三中的实验室“可利用比”最高,求此时![]() |
23-24九年级上·浙江金华·期末 查看更多[1]
(已下线)浙江省金华市婺城区2023-2024学年九年级上学期期末数学试题
更新时间:2024-01-12 16:51:59
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相似题推荐
解答题-问答题
|
困难
(0.15)
解题方法
【推荐1】等腰直角三角形
中,
,点P为AB上一个动点,连接CP,以CP为斜边在CP左侧作等腰直角三角形
.
(1)如图1,当点M恰好落在线段AC上时,PM与AM的数量关系为 ;
(2)点P在如图2位置时,PM与AM的数量关系是否变化,请说明理由;
(3)如图3,平面直角坐标系中,
,点C为
轴上任意一点,连接BC,以BC为斜边在BC左侧作等腰直角三角形
,连接AD,当
为等边三角形时,直接写出此时点C的坐标.
![](https://img.xkw.com/dksih/QBM/2021/5/21/2725703125262336/2732119483662336/STEM/c986f7c4-834b-457e-8e13-ab9e7e01eb88.png)
![](https://img.xkw.com/dksih/QBM/2021/5/21/2725703125262336/2732119483662336/STEM/76a30ddf-0ed9-4e4f-af10-eb7936ea608d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc02795143b31a2dcdacde9ccfbdbbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5082ee8021d7d492322703ceae78fdcf.png)
(1)如图1,当点M恰好落在线段AC上时,PM与AM的数量关系为 ;
(2)点P在如图2位置时,PM与AM的数量关系是否变化,请说明理由;
(3)如图3,平面直角坐标系中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445550e17f8274cef229d9812b65ffed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f757d25909a4893ec4ef916af14345c5.png)
![](https://img.xkw.com/dksih/QBM/2021/5/21/2725703125262336/2732119483662336/STEM/c986f7c4-834b-457e-8e13-ab9e7e01eb88.png)
![](https://img.xkw.com/dksih/QBM/2021/5/21/2725703125262336/2732119483662336/STEM/76a30ddf-0ed9-4e4f-af10-eb7936ea608d.png)
![](https://img.xkw.com/dksih/QBM/2021/5/21/2725703125262336/2732119483662336/STEM/86e62f1e-e4c6-489b-a15e-ac684903c39f.png)
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【推荐2】【提出问题】
(1)已知:菱形ABCD的边长为6,
,
为等边三角形,当点P与点D重合,点E在对角线AC上时(如图1所示),求
的值.
【类比探究】
(2)在上面的问题中,如果把点P沿DA方向移动,使
,其余条件不变(如图2),求
的值;
【拓展迁移】
(3)在原问题中,当点P在线段DA的延长线上,点E在CA的延长线上时(如图3),设
,请直接写出线段AE、AF的长与m有怎样的数量关系.
(1)已知:菱形ABCD的边长为6,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/577250c86a14c7a2990bf9852c7213d5.png)
【类比探究】
(2)在上面的问题中,如果把点P沿DA方向移动,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/577250c86a14c7a2990bf9852c7213d5.png)
【拓展迁移】
(3)在原问题中,当点P在线段DA的延长线上,点E在CA的延长线上时(如图3),设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbd4869dbffe2c1d53ab6b2494de547.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/16/bc34254e-1ee5-450d-8b61-610037a0cf41.png?resizew=452)
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【推荐1】在正方形ABCD中,点E是BC边上一点,连接AE.
![](https://img.xkw.com/dksih/QBM/2020/4/4/2434153741795328/2434433718009856/STEM/0f9282f135024024acf7f5af95e7e075.png?resizew=289)
(1)如图1,点F为AE的中点,连接CF.已知tan∠FBE=
,BF=5,求CF的长;
(2)如图2,过点E作AE的垂线交CD于点G,交AB的延长线于点H,点O为对角线AC的中点,连接GO并延长交AB于点M,求证:AM+BH=BE.
![](https://img.xkw.com/dksih/QBM/2020/4/4/2434153741795328/2434433718009856/STEM/0f9282f135024024acf7f5af95e7e075.png?resizew=289)
(1)如图1,点F为AE的中点,连接CF.已知tan∠FBE=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
(2)如图2,过点E作AE的垂线交CD于点G,交AB的延长线于点H,点O为对角线AC的中点,连接GO并延长交AB于点M,求证:AM+BH=BE.
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【推荐2】如图,在平行四边形ABCD中,O为AC的中点,直线l与边BC重合,将直线l绕点B旋转,旋转角为
,
直线l于点M,
直线l于点N,连接OM、ON
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/08837777-7bf5-466a-b87f-7fb9130d2ac8.png?resizew=167)
(1)如图①,当直线l绕点B逆时针旋转
时,请直接写出OM、ON的数量关系;
(2)如图②,当直线l绕点B顺时针旋转
时,请判断OM、ON的数量关系,并加以证明;
(3)如图③,若旋转角
时,当四边形ABCD为正方形,且边长为
时,请直接写出线段MN的长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e514bc1761deff47d27c1909c1906ab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca5f9d660e68e64d7b7961efee3d4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70deeb73b5f8eb4a1d7ecdd031800ca5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/08837777-7bf5-466a-b87f-7fb9130d2ac8.png?resizew=167)
(1)如图①,当直线l绕点B逆时针旋转
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b805ba5a42710ed443b9ddc96fa708.png)
(2)如图②,当直线l绕点B顺时针旋转
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b805ba5a42710ed443b9ddc96fa708.png)
(3)如图③,若旋转角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60682fac2b1755bc3c7e89ddfeb7be83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
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【推荐3】探究式学习是新课程倡导的重要学习方式,我们做以下探究.
在
中,
,
,
是
边上一点,且
(
为正整数),
、
分别是边
和边
上的点,连接
,且
.
)如图
,当
时,兴趣小组探究得出结论:
,请写出证明过程.
【深入探究】(
)
如图
,当
,试探究线段
,
,
之间的数量关系,请写出结论并证明;
请通过类比、归纳、猜想,探究出线段
,
,
之间数量关系的一般结论(直接写出结论,不必证明).
【拓展运用】(
)如图
,点
为靠近
的四等分点,连接
,设
的中点为
,若
,求点
从点
运动到点
的过程中,请直接写出点
运动的路径长.
在
![](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/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](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/825671c551cc4593793b40c43d46757a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbdd93803e139cce24fe064e8371ea7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91f064bb73019053992fe781a53356a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36978e392c8df4668ed3f74641febbfe.png)
【深入探究】(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
【拓展运用】(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cedd51383f8f047f565191b128cec637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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名校
【推荐1】问题提出
(1)如图①,在边长为10的菱形
中,点E为
上一点,
,在
边上有一点F,连接
,若
平分菱形
的面积,则
的长为;
(2)如图②,在
中,
,M,N分别是
上的动点,且
,点P是
的中点,若
,请求出点
到
距离的最小值;
(3)如图③,某公园计划建一个形状为
的游乐场,其中
米,
米,连接
,
.为方便工作人员通过,要留出一条快速通道
是
边上的动点(可与顶点重合).根据设计要求,线段
平分
的面积,过点C作
于点P,要将
区域修建为家长休息等待区,为使游乐场容纳更多的游乐设施,要求家长休息等待区(即
)的面积尽可能地小,问
的面积是否存在最小值?若存在,请求出
的面积最小值及此时快速通道
的长度;若不存在,请说明理由.
(1)如图①,在边长为10的菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86338536656046e93b53672ade9a78b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(2)如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce7f6d278f2ef7a193b7eed7be6b3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28099fd1dcd9aa8998b845729de18be5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa49835cb36d11ba406fa8cabbecd69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e5c289b8aabdbfba95c7fd1e1842f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42ee217c43129ea5dfb500a5c5590aac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)如图③,某公园计划建一个形状为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ce7638c8484a68f73e0c934f674e2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aff4e127d5f49db0c376822665bee43c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822ba132ca9dd0d4a050659aef3c9b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b4ae488ac5529d20f72b47139f2fb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/523f36065d437d7e606c2b129ac1bea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7bcea5a45eeae211f5851f12a7517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7bcea5a45eeae211f5851f12a7517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7bcea5a45eeae211f5851f12a7517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7bcea5a45eeae211f5851f12a7517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
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【推荐2】如图,四边形
内接于
,
为
的直径,
于点F交
于点E.
,试用含
的代数式表示
;
(2)如图2,若
,求
的值;
(3)在(2)的条件下,若
交于点G,设
,
.
①求y关于x的函数表达式.
②若
,求y的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfee2d62694256483960318d7c00cf75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d15510729f874261e12f231e307d7353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c027cdb8ae39a42318f5731d678407d9.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b40bfc659bec0651b82c57cac91ec6b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e3432d493f3a99e8e050f6a67d186ad.png)
①求y关于x的函数表达式.
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb67f27bcda7681b19239a199b4c4d1.png)
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解答题-证明题
|
困难
(0.15)
【推荐1】如图,在
中,
,以
为直径的
交
边于点
,
于点
,
为
的中点,连接
交
于点
,连接
.
![](https://img.xkw.com/dksih/QBM/2021/4/30/2711006623023104/2715490295103488/STEM/e1f9e03c-d378-4703-87d0-514dd68efd00.png)
(1)求证:
;
(2)求证:
是
的切线;
(3)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/68fbbd17c89f03dbb61cd6ffdb9a0344.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/2021/4/30/2711006623023104/2715490295103488/STEM/e1f9e03c-d378-4703-87d0-514dd68efd00.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a06f38fe74af6559f08d39d86f70ee18.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bfb4e5f108235a7f87ef7b4bf2eedd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c7e0f5d9de12b09fcc70958d0c6a17.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
解题方法
【推荐2】如图,在
与
中,
,
,
,点D在
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/3dbe80c6-ea0b-425a-acfb-4c517fc1e94b.png?resizew=337)
(1)如图1,点D为
中点,连接
,
交于点M,
交
于点N.
①求证:点M在
的外接圆上;
②若
,
,
,求
的值;
(2)如图2,若点D与点A重合,且
,
,将
绕点D旋转,点G为
的中点,连接
,在旋转的过程中,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66b90ffe8c9a93aba917c61007e895.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ca0f2b2b40440365fcce22ac32c0ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9545fa63b0f69136cf7146e14f897e84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/3dbe80c6-ea0b-425a-acfb-4c517fc1e94b.png?resizew=337)
(1)如图1,点D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①求证:点M在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae8221601c7bd5c51fd520615581fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/765922855c551e266992f66b762a86f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d05c5877f86642c4e28d71d6a1aa1b81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/922a5a58be058514f37833e84acaec34.png)
(2)如图2,若点D与点A重合,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4346641491fc90d125ebbd06343382a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a19338598965bb3856cdd0236bbf694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0826136d49f0b848e2583d1a6e7e22cf.png)
您最近一年使用:0次