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正弦余弦刻度尺
Author:
丁银杰
Topic:
Trigonometry
GeoGebra
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球体的体积推导
兩位數除以一位數（一）
画直线等分三角形的面积
四邊形的特性
畫出對稱圖形
Discover Resources
排列
cycloid
倫敦滾石橋2
橢圓(左右型)標準式
畫三角形 題1d 的複本
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Straight Lines
Perimeter
Linear Regression
Tree Diagrams
Scatter Plot