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S0G38 三角形的內心
Author:
学用数学
GeoGebra
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四邉形 (四年級) 教師版
拼砌四邊形
兩位數加法
画直线等分三角形的面积
兩組對邊相等的四邊形
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賺賠：例3
貝式曲線 (Bezier Curve)
聖者即正義
test007
拋物線4--平行四邊形法
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Mode
LCM and GCD
Continuity
Vectors 2D (Two-Dimensional)
Cone