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两平面夹角1
Author:
刘莹
GeoGebra
New Resources
四邉形 (四年級) 教師版
柱體建築師
找出對稱軸
兩組對邊相等和有直角的四邊形
畫出對稱圖形
Discover Resources
Triangular Number 三角形數
Task 2 Equilateral Triangle
Locus of a vertex of equilateral triangle
國旗
圓例9
Discover Topics
Tangent Function
Parallelogram
Quadratic Functions
Geometric Mean
Diagrams