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光的折射
Author:
学用数学
GeoGebra
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四邉形 (四年級) 教師版
拼砌四邊形
四邊形的特性
柱體建築師
球體建築師
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[問題] a² + b² = 1, (c-4)² + (d-2)² = 5,求 ad - bc 最大值?
第1章知识结构框图
tesselation
探究判定全等三角形的条件(ASA)
分割正方体
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Vectors 3D (Three-Dimensional)
Angles
Geometric Transformations
Solids or 3D Shapes
Unit Circle