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三角函數with sine, cosine圖形
Author:
Eric Chang-Chien
GeoGebra
New Resources
兩組對邊相等的四邊形
兩位數除以一位數（一）
四邉形 (四年級) 教師版
判斷球體
【案例】圆柱体内放置一个大球六个小球
Discover Resources
正多面體
齊來製作對稱圖
test2
橢圓的副本
双曲线第一定义
Discover Topics
Similarity Transformation or Similarity
LCM and GCD
Definite Integral
Trapezoid
Cube