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旋轉一物件
Author:
shihfeng
GeoGebra
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兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
算柱 (兩位數)
柱體建築師
第八周作业
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Angle at Centre & Angle at Circumference: Proof 圓心角與圓周角：証明
二元一次方程式 1
周界
蚂蚁在长方体表面爬行的最短路径问题
翰林數學_2下_CH3-1_多邊形的外角和
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Percentages
Definite Integral
Fractal Geometry
Random Variables
Parabola