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垂直線的斜率
Author:
Anthony OR 柯志明
拖拉紅色 C 點,令兩線垂直。 兩垂直線的斜率有甚麼關係?
GeoGebra
柯志明 香港 GeoGebra 學院
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Torus
seo tool
Kite Function Art
Geometric linkage
Set Operations (2 Sets)
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Rotational Symmetry
DMS Animation B
Dynamic Bars
Copia di Tangram
Birkenstock tiling transformation
EC 1718 F5 angle at centre twice angle at circumference
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Random Variables
Stochastic Process or Random Process
Reflection
Linear Functions
Curve Sketching