如图,在
中,
,
的面积为36,动点P从A点出发,以1个单位长度的速度沿线段
向终点D运动,同时动点Q从点B出发以3个单位长度的速度在
间往返运动,当点P到达点D时,动点P、Q同时停止运动,连结
.设运动时间为t秒.
(1)则
和
之间的距离为 _____ ;
(2)当
平分
的面积时,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db5807cb341fc271c8ee6900b4f1982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(1)则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
22-23八年级下·浙江杭州·期中 查看更多[4]
浙江省杭州市萧山区八校2022-2023学年八年级下学期期中数学试题(已下线)专题11 浙江省八年级下期中试卷选择、填空易错题、压轴题精选【好题汇编】-备战2023-2024学年八年级数学下学期期中真题分类汇编(浙教版)(已下线)压轴真题必刷03 图形的平移与旋转(压轴35题9种题型训练)-2023-2024学年八年级数学下学期期中考点大串讲(北师大版)(已下线)第03讲 中心对称与中心对称图形(知识解读+达标检测)-2023-2024学年八年级数学下册《知识解读·题型专练》(浙教版)
更新时间:2024-04-20 11:06:15
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解答题-作图题
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名校
【推荐1】如图,在
中,点D为
边上一点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/f80020e1-86ed-4d45-8e0a-69ff4c640062.png?resizew=214)
(1)尺规作图:作射线
,使得
,且射线
交
的延长线于点E(不要求写作法,保留作图痕迹);
(2)在(1)的条件下,连接
,若
,求证:四边形
为平行四边形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/f80020e1-86ed-4d45-8e0a-69ff4c640062.png?resizew=214)
(1)尺规作图:作射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59089701b1cfb9ac3db3b5a7f8cac66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)在(1)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6703a78d8d161ec1b7bcd5dcfe45b22e.png)
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解答题-证明题
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【推荐2】如图,在平行四边形
中,
、
都是
的垂线,M、N是垂足.求证:
.
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/7/7fc8df17-3eec-4b17-b342-297cd6bac008.jpg?resizew=125)
(1)
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(2)
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解答题-问答题
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【推荐1】如图,正方形网格中的每个小正方形的边长都是1,每个小格的顶点叫格点,以格点为顶点分别按下列要求画图,要求它的顶点均在格点上.
(1)在图①中画一个面积为8的菱形
,使顶点在格点上;
(2)在图②中,作以
为一边的平行四边形
,使点
在格点上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/11/e0a591a4-9165-4c1f-b4aa-fdf0b8685aa6.png?resizew=222)
(1)在图①中画一个面积为8的菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
(2)在图②中,作以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c29a7e8eea08197bf53164a560bee58.png)
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解答题-证明题
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【推荐2】如图,在平行四边形
中,点
为
边的中点,
与对角线
交于点
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![](https://img.xkw.com/dksih/QBM/2023/2/9/3171158140919808/3172398965088256/STEM/b1bbead258e346fab51e8b73e1c62349.png?resizew=238)
(1)求证:
;
(2)当
且
时,若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2023/2/9/3171158140919808/3172398965088256/STEM/b1bbead258e346fab51e8b73e1c62349.png?resizew=238)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bdcc594309dc578d74037884b86a489.png)
(2)当
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