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angle between planes
Author:
johnmayhk
GeoGebra
New Resources
判斷球體
兩位數加法
兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
Discover Resources
Platonic Solids 柏拉圖立體
立體圓錐與斜切面關係
平面外積、有向面積、二階行列式
GGB2
橢圓代數性質,光學性質,生活應用
Discover Topics
Conic Sections
Fractal Geometry
Mode
Right Triangles
Logarithm