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乘法練習
Author:
周錦鋒
GeoGebra
New Resources
常见四边形是否是双心四边形
第三周作业效果演示
直線的斜率：水平變化 & 鉛垂變化
百分數及其應用
撒针估算面积实验
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練習 - 反射對稱
廣義三角：tan
动点
構作對稱圖形
动圆与两(相离)圆外切
Discover Topics
Tangent Function
Polygons
Trigonometric Functions
Geometric Transformations
Distributions