在平面直角坐标系中,
的顶点坐标分别为
,
,
.
![](https://img.xkw.com/dksih/QBM/2019/12/16/2356386057928704/2357179240308736/STEM/b59c24af-9491-4f46-966a-d2f6d5c6bf37.png?resizew=263)
(1)求
的面积.
(2)若
交
轴于点
,请求出
点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d295a4cc3a58f9f38ee98337313c81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557437a8641a61bf64c1e40f2bbf72a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d3b76fed893ad17bc60ee4cbe4ab524.png)
![](https://img.xkw.com/dksih/QBM/2019/12/16/2356386057928704/2357179240308736/STEM/b59c24af-9491-4f46-966a-d2f6d5c6bf37.png?resizew=263)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
更新时间:2019-12-17 17:56:21
|
【知识点】 坐标与图形
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在平面直角坐标系中,点
,
,且
,
,以
为腰作等腰
,
,点
为
的中点,直线
轴,交
轴于点
,交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/2022/12/26/3139356581715968/3142201910648832/STEM/83bbaf8fefc146a7a324a2deded84ee8.png?resizew=234)
(1)求证:
;
(2)若
,试探究a,b之间的关系式;
(3)在(2)的条件下,当
时,求三角形
的面积
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c240561788bc63f41a6703219fb66d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c09615735d331befd07664aa47cb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac9eb4f13a6ec140f7050e8d7dde52c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/a04dedaa24981a33d759ca2ddaec0816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2022/12/26/3139356581715968/3142201910648832/STEM/83bbaf8fefc146a7a324a2deded84ee8.png?resizew=234)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623052b0412de4bc11b5c3c532756eb2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8a363c828b940f35761b3f0ef83c41.png)
(3)在(2)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f687c2efca3c54e4e0d12a05c5e5f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/964a03b52804a71385a721ece999793b.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】在如图所示的平面直角坐标系中,按要求解决下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/19/6143bf86-233d-47fd-a7ec-8e3064f98834.png?resizew=254)
(1)描出点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dc82def919412bb79f3719203c38f3f.png)
(2)连接
,判断
的形状,并说明理由;
(3)
的面积为______________
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/19/6143bf86-233d-47fd-a7ec-8e3064f98834.png?resizew=254)
(1)描出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dc82def919412bb79f3719203c38f3f.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0e08a39c6619123557148d195abfbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-作图题
|
适中
(0.65)
【推荐3】在《二元一次方程组》“数学活动”的学习中,小华同学对二元一次方程
的解与平面直角坐标系内点的对应关系做了如下探究,请将小华同学的探究过程补充完整.
(1)补全下列表格,使上下每对
,
的值都是方程
的解.
则表格中的
______,
______;
(2)如果将表中的各组解表示为点的坐标
的形式,例如,方程
的解
对应的点是
,请在所给的平面直角坐标系中依次描出方程
的以上五组解所对应的点,尝试将这些点连起来,观察这些点所组成的图形的特征,猜想方程
的所有解的对应点组成的图形是______,并根据猜想画出这个图形.我们把这个图形叫做二元一次方程
的图象;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/23/d0f7d718-4b06-4406-8ea1-6a9e8c94ca39.png?resizew=222)
(3)根据前两问的学习经验,请在上面所给的平面直角坐标系中画出二元一次方程
的图象;
(4)小华同学说,这两个二元一次方程图象的交点坐标就是二元一次方程组
的解,请你直接写出这个解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42498f6e0fc9a61c9857b70a87f02c5e.png)
(1)补全下列表格,使上下每对
![](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/42498f6e0fc9a61c9857b70a87f02c5e.png)
… | 0 | 1 | … | ||||
… | 0 | 2 | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
(2)如果将表中的各组解表示为点的坐标
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9c5c7cffee04e1a5545ea43e6f0f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42498f6e0fc9a61c9857b70a87f02c5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f5205ef42de1481f3cb6a37b68069c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf8caae4cd70bf5c8b9ad01852257035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42498f6e0fc9a61c9857b70a87f02c5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42498f6e0fc9a61c9857b70a87f02c5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42498f6e0fc9a61c9857b70a87f02c5e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/23/d0f7d718-4b06-4406-8ea1-6a9e8c94ca39.png?resizew=222)
(3)根据前两问的学习经验,请在上面所给的平面直角坐标系中画出二元一次方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45900deae0489e87fe448948e8091c4.png)
(4)小华同学说,这两个二元一次方程图象的交点坐标就是二元一次方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96e6b737dfc47cc8d4366679088ccd7.png)
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