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cos, sin 與單位圓
Author:
羅驥韡 (Pegasus Roe)
Topic:
Trigonometry
GeoGebra
New Resources
異分母分數減法
兩位數除以一位數（二）
畫出對稱圖形
算柱 (兩位數)
拼砌四邊形
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滾動圓周來發現圓周長
畫三角形 題3b
Rectangle _03
陳柄何的GGB book
zhengming
matrix of rotation transformation
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Means
Hyperbola
Exponential Functions
LCM and GCD
Coordinates