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直角三角形斜邊上的高小於斜邊的一半
Author:
chihchengliang
GeoGebra
New Resources
錐體建築師
兩組對邊相等和有直角的四邊形
球体的体积推导
四邉形 (四年級) 教師版
兩位數加法
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直线平分三角形面积
ruler
Area of Triangle
Sine Wave 3D
正方体展开图的副本
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Vectors
Trigonometry
Diagrams
Volume
Stochastic Process or Random Process