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推移（x 方向）的副本
Author:
xiaodandan
,
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
畫出對稱圖形
Earth with coastline
四邉形 (四年級) 教師版
近似值：有效數字
AI 訓練教室
Discover Resources
Introduction to Trigonometry from a Unit Circle
先估算，後看解釋
給三角形, 求以三頂點為圓心, 作三個外切圓
圆的面积展开的副本
圓心在同一直線上且相切的圓(半徑可改變)
Discover Topics
Integers
Diagrams
Definite Integral
Arithmetic Mean
Sine