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2021南京中考数学27
Author:
蔡永志
GeoGebra
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兩組對邊相等和有直角的四邊形
拼砌四邊形
Fibonacci Clock
Earth with coastline
近似值：有效數字
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指數與對數的對稱性
Circle
給錐體一個名字 2
希式半月形的變形
barara magic stick
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Parabola
Volume
Geometry
Arithmetic
Median Line