(1)在下列网格中画出△ABC关于l的对称图形△A1B1C1;
(2)在l上确定一点P,使得PA+PB最小.(画图确定无误后黑色签字笔涂黑)
(2)在l上确定一点P,使得PA+PB最小.(画图确定无误后黑色签字笔涂黑)
![](https://img.xkw.com/dksih/QBM/2021/12/2/2863633586176000/2869530346258432/STEM/39648a9c7a1d4d80b3f22ed5200f2b21.png?resizew=209)
更新时间:2021-12-10 14:57:20
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【推荐1】如图,在旷野上,一个人骑着马从A地到B地,半路上他必须让马先到河岸l的P点去饮水,然后再让马到河岸m的Q点再次饮水,最后到达B点,他应该如何选择马饮水地点P、Q,才能使所走路程
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解答题-作图题
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【推荐2】如图所示,直线l是一条平直的公路,A,B是两个车站,若要在公路l上修建一个加油站,如何使它到车站A,B的距离之和最小,请在公路上表示出点P的位置,并说明理由.(保留作图痕迹,并用你所学的数学知识说明理由).
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解答题-作图题
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较易
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【推荐1】如图,在平面直角坐标系中,
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(1)画出
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
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(2)如果点
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解答题-作图题
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【推荐2】如图,在由边长为1个单位长度的小正方形组成的网格中,
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(3)在直线
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(1)将
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(2)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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(3)在直线
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(4)求
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