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02一天之內太陽與影子_含仰角動畫
Author:
陳民峰
GeoGebra
New Resources
算柱 (兩位數)
兩位數除以一位數（二）
小数 的副本
判斷球體
兩位數加法
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方格紙上畫長方形2
Rotational and reflectional symmetry of a regular polygon
平均線
橢圓1--四圓心近似法
勾股定理
S5R1L4圆内迭代反射——朱老师
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Pie Chart or Circle Chart
Solids or 3D Shapes
Numbers
Means
Interest Calculation