一个多边形的外角和与它的内角和的比是
,求这个多边形的边数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4226b7257867243d80da811639ce355.png)
21-22八年级下·全国·课后作业 查看更多[2]
更新时间:2023-03-13 22:39:10
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相似题推荐
解答题-问答题
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适中
(0.65)
【推荐1】如图,在四边形
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a66fd0f3f3a85320d9de837ae178aec9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/7a6309c1-ad85-432c-8283-0c5f9b73999d.png?resizew=415)
(1)
(含x,y的式子直接填空);
(2)如图1,
,
平分
,
平分
,请写出
与
的位置关系,并说明理由;
(3)如图2,
为四边形
的
相邻的外角平分线所在直线构成的锐角,若
,求x、y的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a66fd0f3f3a85320d9de837ae178aec9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/7a6309c1-ad85-432c-8283-0c5f9b73999d.png?resizew=415)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/541ed2f46f2b074a6b22349feec39060.png)
(2)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbbbc32dfc268ce4aea13a11f7259257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28537fd3056afc85c8f671e0756666f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(3)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2997a1f93e64edb331481b5a1f7fdbeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfda6effd1d8739bc7d9e4f3b21c27f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab25e450876c355b036d702435daf541.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】(1)如图1,在△ABC中,已知OB,OC分别平分∠ABC,∠ACB,BP,CP分别平分∠ABC,∠ACB,的外角∠DBC,∠ECB.
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645119090475008/2650794878164992/STEM/f5f28d4100d645d5b0ba4d1de702e078.png?resizew=478)
①若∠A=50º,则∠O=______,∠P=______;
②若∠A=α,则∠O=______,∠P=______.(用含α的式子表示)
(2)如图2,在四边形ABCD中,BP,CP分别平分外角∠EBC,∠FCB,请探究∠P与∠A,∠D的数量关系,并说明理由;
(3)如图3,在六边形ABCDEF中,CP,DP分别平分外角∠GCD,∠HDC,请直接写出∠P与∠A,∠B,∠E,∠F的数量关系______.
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645119090475008/2650794878164992/STEM/f5f28d4100d645d5b0ba4d1de702e078.png?resizew=478)
①若∠A=50º,则∠O=______,∠P=______;
②若∠A=α,则∠O=______,∠P=______.(用含α的式子表示)
(2)如图2,在四边形ABCD中,BP,CP分别平分外角∠EBC,∠FCB,请探究∠P与∠A,∠D的数量关系,并说明理由;
(3)如图3,在六边形ABCDEF中,CP,DP分别平分外角∠GCD,∠HDC,请直接写出∠P与∠A,∠B,∠E,∠F的数量关系______.
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解答题-作图题
|
适中
(0.65)
【推荐1】如图1,
,
是直线
上的一点,且
,
是直线
上的一动点,
是
的中点,直线
且与
交于点
,设
,
.
(1)在图2中,当
时,
______;在图3中,当
时,
______;
(2)研究及明:
与
之间关系的图象如图4所示(
不存在时,用空心点表示,请你根据图象直接估计当
时,
______.
(3)探究:当
______时,点
与点
重合,并在答题卡上画出此时图形.
(4)探究:当
时,求
与
之间的关系式______.
![](https://img.xkw.com/dksih/QBM/2021/7/7/2758999437090816/2824431606022144/STEM/8a430ab0cb224c0b86f623ec4bbd2b47.png?resizew=535)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f57b8380e1c9d059087e2bd121153f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcabbb4a3204d94675ce39838e13c3af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5a2823006ed088a36b5aa685e156dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7133de54ac8294aabe7a0c2dfbc1e9c7.png)
(1)在图2中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5072bef93b6845e3332a2b212e32b46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ade431ba6b4969476308d602d100aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04df7cdab2a938e8c64b302b32e8d490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ade431ba6b4969476308d602d100aa.png)
(2)研究及明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd63ebbdb834dd3028f1bdb3cb948d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
(3)探究:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(4)探究:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209f83fab794bffa113c6e3068f9d028.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/2021/7/7/2758999437090816/2824431606022144/STEM/8a430ab0cb224c0b86f623ec4bbd2b47.png?resizew=535)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知正多边形的一个外角等于18度,求这个正多边形的边数.是否存在一个内角度数为100度的正多边形?如果存在,求出边数;如果不存在,请说明理由.
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