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slide21
Author:
tao sun
GeoGebra
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直線的斜率:水平變化 & 鉛垂變化
圓的切線方程
垂直線的斜率
球体的体积推导(优化版)
多邊形的面積
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直角三角形的三角比
Why same areas?
trigonometry3
性質三十三_四邊形四邊外接指定條件的平行四邊形
尺规作图得到黄金三角形和黄金矩形
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Cuboid
Mode
Power Functions
Fractions
Integral Calculus