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三角形面積.Area of Triangle
Author:
harryau
Area of triangle. 三角形面積.
GeoGebra
New Resources
錐體建築師
四邉形 (四年級) 教師版
球体的体积推导（优化版）
画直线等分三角形的面积
【案例】圆柱体内放置一个大球六个小球
Discover Resources
畢式定理 (09)
異分母分數加法
trigonometry
sweet sugar
duality of regular polyhedron
Discover Topics
Polynomial Functions
Statistics
Translation
Median Line
Linear Programming or Linear Optimization