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作者：
kaussma2018
GeoGebra
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Riemann Sums
z`]]
Steel Chair
bewijs stelling van Pythagoras
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For n = 6
The Abiguous Triangle
Parallelogram Diagonal Angles
Bài tập 10 trang 92
Koti, trikotnik
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坐標
統計
角錐
橢圓
最小公倍數與最大公因數