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反射定律 Law of Reflection
Author:
W.L. Wong, Albert
GeoGebra
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【案例】2018年全国1卷理科12题
柱體建築師
算柱 (兩位數)
兩位數除以一位數（一）
兩位數除以一位數（二）
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相似圖形基本概念
方格紙上畫長方形2
line equation
求兩斜線區域的差
Degrés vers radians
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Frequency Distribution
Hyperbola
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