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waaachen
Author:
陳兪宏
阿凱老師的幾何問題
GeoGebra
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第八周作业
算柱 (兩位數)
兩組對邊相等的四邊形
四邉形 (四年級) 教師版
錐體建築師
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xsggh
畫圓
老師~這樣算另一種嗎??
拋物線6--包絡線法
Copy of 劉徽的「割圓術」
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Upper and Lower Sum or Riemann Sum
Integers
Diagrams
Hypergeometric Distribution
Cube