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geo123
Author:
hsu hung yang
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四邉形 (四年級) 教師版
算柱 (兩位數)
異分母分數減法
找出對稱軸
兩位數除以一位數（一）
Discover Resources
幾何變換
教學－橫切面
旋转文本
繪畫四邊形
椭圆内切圆链
Discover Topics
Boxplot
Combinatorics
Subtraction
Kite
Optimization Problems