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Introduction to Trigonometry from a Unit Circle
Author:
Lam Yat Chun
GeoGebra
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兩位數除以一位數（二）
算柱 (兩位數)
找出對稱軸
畫出對稱圖形
球体的体积推导（优化版）
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檢驗區
三條線上的正三角形
四次函數圖形觀察
Triangle
[洋葱] 四边形与旋转变换
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Interest Calculation
Logic
Linear Regression
Statistics
Statistical Characteristics