2018年秋九年级数学上册23.3课题学习图案设计课后作业(新版)新人教版.doc

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123.3 课题学习 图案设计1.已知:图 A、图 B 分别是 66 正方形网格上的两个 轴对称图形(阴影部分),其面积分别为 、 (网格中最小的正方形面积为一个平方单位),请观察图形并解答下列问S题(1)填空: 的值是_ ;AB(2)请在图 C 的网格上画出一个面积为 8 个平方单位的 中心对称图形 2.如图中的图案是由一个怎样的基本图形经过旋转、轴 对称和平移得到的呢?23.请你用基本图形 经过旋转、平 移和轴对称设计一个美丽的图案。能力提升1.在右图的方框中做出以 O 为旋 转中 心旋 转后的图形 2.利用你所学过的图形变换的知识 设计一个图案,3参考答案基础训练 1.(1)911;(2)略.2.略。能力提升 1.图略.2.略

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