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诱导公式五（90°+α）
Author:
桃篮翁
GeoGebra
New Resources
兩位數加法
球體建築師
判斷球體
GeoGebra笔记功能体验课件
兩組對邊相等和有直角的四邊形
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task 8
拉格朗日插值法
進出刀量測-圓形
B4 4-1 平行線性質延伸 等積變換
圖解直式開方
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Distributions
Quadratic Functions
Tangent Function
Square
Ratios