(1)如图1,这是一个五角星
,求
的度数.
(2)如图2,如果点B向右移动到
上,直接写出
的度数.
(3)如图3,当点B向右移动到
的另一侧时,直接写出
的度数.
(4)如图4,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31dc92fc481bd2f4b2a468107f59ded5.png)
(2)如图2,如果点B向右移动到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61bcc84367cc3ba8256e734b7b9411d0.png)
(3)如图3,当点B向右移动到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61bcc84367cc3ba8256e734b7b9411d0.png)
(4)如图4,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec7cc870cceb6d09d0f38cebdb131e72.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/deddf515-0654-42d1-bc72-0d6ef006ae0a.png?resizew=445)
更新时间:2024-03-19 13:05:25
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图1所示,已知点E在直线
上,点F,G在直线
上且
,
平分
,如图2所示,H是
上点E右侧一动点,
的平分线
交
的延长线于点Q,设
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/385629a1-9170-4cee-b9c0-ce85f0c654aa.png?resizew=366)
(1)若
,求
的度数;
(2)判断:点H在运动过程中,α和β的数量关系是否发生变化?若不变,求出α和β的数量关系;若变化,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/599cec6e67881a10de3e9b882b7260d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482e68d608de7675e15bb759acd8204c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90429ba8b029e318a971acda776aaa1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e66b12019cdf68327d34c90dff7c04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/838447c46e7b22d2496099033edef39c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/385629a1-9170-4cee-b9c0-ce85f0c654aa.png?resizew=366)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e72fd87f34a4f364dd75f62ca3ce4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595522dfc96cc92f1d84ea0f298bb738.png)
(2)判断:点H在运动过程中,α和β的数量关系是否发生变化?若不变,求出α和β的数量关系;若变化,请说明理由.
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解答题-问答题
|
适中
(0.65)
【推荐2】综合与实践:
问题情境:已知,
中,
,
,点D,E分别在BC,AC边上,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/19/1169bb9c-b59a-4970-91a9-434a981aced9.png?resizew=359)
(1)如图1,若
,且
恰好平分
,则
的度数为______°.
类比思考:
(2)如图2,若
,且点
是
边上的任意一点,小颖发现
的度数为定值.求
的度数;
联系拓广:
(3)如图3,将问题情境中的“点D,E分别在BC,AC边上”改为“点D,E分别在BC、AC的延长线上”,其余条件不变.
请从下面A,B两题中任选一题作答.我选择______题.
A.若
,直接写出此时
的度数.
B.直接写出
的度数(用含
的式子表示).
问题情境:已知,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2cf0e95fdf1fd8a5b01d3dfd905e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b09196044f4c0d105cff56e433b0236b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/19/1169bb9c-b59a-4970-91a9-434a981aced9.png?resizew=359)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46bbaf4557fbc34e90039cc6494edfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
类比思考:
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51af2577e349157f70effa2a074c9c23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
联系拓广:
(3)如图3,将问题情境中的“点D,E分别在BC,AC边上”改为“点D,E分别在BC、AC的延长线上”,其余条件不变.
请从下面A,B两题中任选一题作答.我选择______题.
A.若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51af2577e349157f70effa2a074c9c23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
B.直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,
中,
,点
是
上一点,
,连接
是
的角平分线,交
于点
,交
于点
,连接
.
![](https://img.xkw.com/dksih/QBM/2022/12/30/3142099612999680/3144737134010368/STEM/69e8887a736c4cf8be572c1b0d3bcb2c.png?resizew=157)
(1)若
,求
的度数;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.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/e3d2d3643a9579f2c693ef86909441e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87aab936ef1ddeaab717bc3d07a2c046.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/2022/12/30/3142099612999680/3144737134010368/STEM/69e8887a736c4cf8be572c1b0d3bcb2c.png?resizew=157)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03c157441734cc2f1853bb3e15b631a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35803969509655f72b4118503ae1c966.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad98ad714864041a632ca949308e417.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】将锐角
放置在一块正方形卡纸
上,使点
在正方形的
和
边上.
![](https://img.xkw.com/dksih/QBM/2020/10/6/2565359732555776/2566019742031872/STEM/05e25a5a-5e4e-452e-b26b-71c0e047ce71.png)
(1)如图①,若
,则
__________度,
_______________度,
_____________度.
(2)如图②,改变正方形卡纸
的位置,请探究
与
之间存在怎样的数量关系,并验证你的结论.
(3)如图③,正方形卡纸的顶点
在
外,且在
边的左侧,请探究
,
三者之间存在怎样的数量关系,直接写出探究结果,不必验证.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/2020/10/6/2565359732555776/2566019742031872/STEM/05e25a5a-5e4e-452e-b26b-71c0e047ce71.png)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8117b8e89b9aa4ed51fbaa8df8381c25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da224b15dcd3f2271afc0b793a16b1b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f135061b5d40b25e997279a250bd17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926b9dfffa6af158d02a9e2549d9bd32.png)
(2)如图②,改变正方形卡纸
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e969b8518612d42888a2c2ab55d0b3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(3)如图③,正方形卡纸的顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](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/351ccfead28075f520299012c24abc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
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解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,在
中,
、
边的垂直平分线
与
交于点
,与
分别交于点
、
.连接
,
.
(1)若
,求
的周长;
(2)若
,求
的度数.
![](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/ccb6eb78ca96fc50b152315665461e6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/582b8f63e72b0d2785a48a8467f8ae9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/10/4a89c2ff-ffb5-4d30-a6c7-cda552bcbd63.png?resizew=175)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80adb1db63395eec9430a4323bdcd0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,在
中,
,点
,
分别在
,
上,
,连接
,连接
,将线段
绕点
按顺时针方向旋转
后得
,连接
.
(1)求证:
;
(2)若直线
交
于点
,直接写出
的度数.
![](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/8455657dde27aabe6adb7b188e031c11.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/db3b0b5010813ccc388a41ba74f3b932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/17/5a529946-c1a8-40c9-b48e-a40ccc3abd24.png?resizew=133)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae3fb9bdc74ae8cfaf949c2b21b2b31.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec88884321733714de9db5466629ccf2.png)
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