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T,N,B vectors of space curve.
Author:
Wu Xiao-Ren
Frenet Frame of space curve. Frenet Frame
,
,
GeoGebra
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球体的体积推导
兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
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F1Geometry
glt-c02-10 六角柱旋轉
勝者即正義
題 5
邊長與三角形（一） 的複本
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Interest Calculation
Combinatorics
Variance
Diagrams
Quadratic Functions