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Perigal's Dissection
Author:
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
算柱 (兩位數)
Nested spiral octagon
小数 的副本
兩組對邊相等和有直角的四邊形
sanjiaohanshu
Discover Resources
優良作品4
Similar Figures (QMSS)
微積分基本定理的副本
三角形的四心－五線－內外二圓的副本
勒洛四面体（参数曲面法）
Discover Topics
LCM and GCD
Sine
Hypothesis Testing
Incircle or Inscribed Circle
Parallelogram