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生日问题1
Author:
徐晓东
GeoGebra
New Resources
圓的切線方程
正方形雪花图案
盈利與虧蝕
圓的基本性質
常见四边形是否是双心四边形
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自製座標軸箭頭與標籤
test02
鑲嵌
二倍角的正弦公式的证明
堆疊正立方體 的複本
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Square
Vectors 2D (Two-Dimensional)
Vectors
Quadratic Functions
Trigonometric Functions