某市旧城改造项目计划在一块如图所示的三角形空地上种植某种草皮美化环境,经过测量得
,
的外角
.已知这种草皮每平方米a元,则购买这种草皮一共需要多少钱?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9931a1b22d76db81c77551ec7ee90ef2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63548b884796383e947edf1f482a58cc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/18142657-a871-44e6-94fc-24291af9cb1e.png?resizew=106)
更新时间:2022-12-10 16:06:54
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解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,在等腰三角形
中,
,
,点
为直线
上一点,
于点
,直线
与直线
交于点
,
为直线
上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/d0cfd2be-c729-429e-8d2c-3a7987acb868.png?resizew=239)
(1)若
为线段
上一点,如图1,如果
,
,
,求
的长;
(2)若
为线段
上一点,如图1,求证:
;
(3)若
为
延长线上一点,如图2,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685bc9f51445c6ecd5158f4419969f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e5b0a448b6ffa435486e09df0f23cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/d0cfd2be-c729-429e-8d2c-3a7987acb868.png?resizew=239)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14252009a6dd4ced2746d25089bafb2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5564681937f41e1489d69b20a71f9222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad77ee5dab4fbed93c0172b2330077cf.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d32ac820e9ab572690649f16b87aa273.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,△ABC中,∠ACB=90°,∠ABC=30°,AD平分∠CAB,延长AC至点E,使CE=AC.
![](https://img.xkw.com/dksih/QBM/2022/3/30/2947536660652032/2948648932818944/STEM/8960505eb4fc426a89522bf9f515b824.png?resizew=260)
(1)若CD=1,求BD的长
(2)连接BE,试判断△ABE的形状,并说明理由.
![](https://img.xkw.com/dksih/QBM/2022/3/30/2947536660652032/2948648932818944/STEM/8960505eb4fc426a89522bf9f515b824.png?resizew=260)
(1)若CD=1,求BD的长
(2)连接BE,试判断△ABE的形状,并说明理由.
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,在
ABC中,AB=AC=5,∠B=50°,点D在线段BC上运动(点D不与点B,C重合),连接AD,作∠ADE=50°,DE交线段AC于点E.
(1)当∠BDA=110°时,∠EDC=________°,∠AED=________°.
(2)线段DC的长度为何值时,
ABD≌
DCE,请说明理由;
(3)在点D的运动过程中,
ADE的形状可以是等腰三角形吗?若可以,请求出∠EDC的度数;若不可以,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(1)当∠BDA=110°时,∠EDC=________°,∠AED=________°.
(2)线段DC的长度为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(3)在点D的运动过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/2021/11/12/2849787483136000/2852564254105600/STEM/c98cab49-e189-40bb-a022-766c0822be6c.png?resizew=153)
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解答题-作图题
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适中
(0.65)
【推荐2】
中,
,将线段
绕点A逆时针旋转
得到线段
.作射线
,点C关于射线
的对称点为点E.连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/fe1daa32-dc84-4512-9033-896ac6dc31ec.png?resizew=236)
(1)依题意补全图形;
(2)若
,直接写出
的度数;
(3)写出一个
的值,使
时,线段
的长为
,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b18755ce1eaa81a75096a6e4aff0ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b40aa8d2482d698ebef69cf225f99f8.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/fe1daa32-dc84-4512-9033-896ac6dc31ec.png?resizew=236)
(1)依题意补全图形;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7209c73ac82338a7def4decc693dc633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4598486f8c5ac28b1165b76e78105979.png)
(3)写出一个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9563540452712a60d70f76cf22a868c9.png)
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