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金字塔二相邻平面的夹角（底面为长方形）
Author:
纪露结
Topic:
Geometry
GeoGebra
New Resources
רישום חופשי
判斷錐體
畫三角形
Pythagorean Day
z`]]
Discover Resources
kegel
Volumen integral triple cartesianas
Work to Lift Chain
Унакрсни и упоредни углови
Challenge 2a: Reflection in the line y = a
Discover Topics
Matrices
Variance
Standard Deviation
Triangles
Arithmetic