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請做出一正三角形
Author:
yen
請做出一正三角形
GeoGebra
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算柱 (兩位數)
四邊形的特性
四邉形 (四年級) 教師版
柱體建築師
異分母分數減法
Discover Resources
Trigonometric Ratios: Sine 三角比：正弦
Compare areas by cutting shapes Q2
動畫基本滑桿
Copy of 倒數計時
元旦快乐（制作：孟宝兴）
Discover Topics
Trigonometry
Vectors 2D (Two-Dimensional)
Geometric Transformations
Division
Multiplication