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正弦定理的证明
Author:
梁航宇
GeoGebra
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【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
找出對稱軸
算柱 (兩位數)
兩位數除以一位數(二)
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sin&cos
弧長計算
单晨正方形在正六边形内部滚动的课件
杨桃李GGB绘本
一个周期内的正弦曲线
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Subtraction
Expected Value
Cube
Logic
Reflection