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Author:
Yin Kelvin Wong
GeoGebra
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兩組對邊相等和有直角的四邊形
錐體建築師
兩位數除以一位數(二)
球体的体积推导(优化版)
四邉形 (四年級) 教師版
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橢圓軌跡(兩同心圓)102.12.04
相切的三圓
BkD_act15_02c
運用量角器量度以下角度
拋物線4--平行四邊形法
Discover Topics
Hyperbola
Differential Calculus
Fractions
Stochastic Process or Random Process
Arithmetic Mean