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銳角三角：tan
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
近似值：有效數字
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
直角坐標平面上的旋轉變換
兩位數加法
Discover Resources
Rotational Symmetry - Tetrahedron
兩點長度
reflectional symmetry_1
二重積分 (Double Integral)的副本
初三第十五讲真卷4-23题
Discover Topics
Congruence
Geometry
Exponential Functions
Natural Numbers
Linear Programming or Linear Optimization