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内外弦图
Author:
王彤
GeoGebra
New Resources
柱體建築師
【案例】圆柱体内放置一个大球六个小球
異分母分數減法
三位數除以一位數（二）
兩位數除以一位數（二）
Discover Resources
Addition and Subtraction of Directed Numbers (1) 有向數加減(1)
VV圓
兩向量的比
滑桿動畫
擲銀實驗
Discover Topics
Secant Line or Secant
Binomial Distribution
Trigonometry
Trapezoid
Addition