如图,方格纸中的每个小方格都是边长为1的正方形,我们把以格点间连线为边的三角形称为“格点三角形”,图中的△ABC就是格点三角形,建立如图所示的平面直角坐标系,点C的坐标为(0,﹣1).
(1)在如图的方格纸中把△ABC以点O为位似中心扩大,使放大前后的位似比为1:2,画出△A1B1C1(△ABC与△A1B1C1在位似中心O点的两侧,A,B,C的对应点分别是A1,B1,C1).
(2)利用方格纸标出△A1B1C1外接圆的圆心P,P点坐标是 ,⊙P的半径= .(保留根号)
(1)在如图的方格纸中把△ABC以点O为位似中心扩大,使放大前后的位似比为1:2,画出△A1B1C1(△ABC与△A1B1C1在位似中心O点的两侧,A,B,C的对应点分别是A1,B1,C1).
(2)利用方格纸标出△A1B1C1外接圆的圆心P,P点坐标是 ,⊙P的半径= .(保留根号)
![](https://img.xkw.com/dksih/QBM/2018/12/3/2089033187565568/2095408159596544/STEM/20fd41e942034db890460fdfc8b8a9ae.png?resizew=238)
2017·江苏扬州·二模 查看更多[6]
江苏省高邮市、宝应县2017届九年级下学期网上阅卷第二次适应性训练(二模)数学试题【区级联考】江苏省南京市秦淮区2018届九年级(上)期末数学试题【区级联考】江苏省南京市秦淮区2019届九年级(上)期末数学模拟试题(一)江苏省常州市溧阳市2020-2021学年九年级上学期期末数学试题2019年江苏省盐城中学中考数学最后一卷(已下线)课时27.3 位似-2021-2022学年九年级数学下册链接教材精准变式练(人教版)
更新时间:2017-05-29 09:41:02
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解答题-问答题
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解答题-作图题
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【推荐2】如图,在平面直角坐标系中,已知
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解答题-作图题
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解答题-作图题
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