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1-2 老師講解12 簡諧運動（摩天輪）
Author:
陳家豪
GeoGebra
New Resources
Fibonacci Clock
第八周作业
近似值：有效數字
兩組對邊相等的四邊形
Nested spiral octagon
Discover Resources
多邊形上的自由動點
軌跡
ma_test
面積
頂、棱與面
Discover Topics
Combinatorics
Incircle or Inscribed Circle
Quadrilaterals
Differential Calculus
Inequalities