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到正方形内部距离相等的点
Author:
赵林
GeoGebra
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四邉形 (四年級) 教師版
判斷球體
兩位數除以一位數(二)
球体的体积推导(优化版)
兩組對邊相等的四邊形
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旋梯
蝴蝶定理推廣證明2(交比)
圓內兩半圓相切問題
數學傳播39卷4期, 平面幾何公式思考
Copy of 正方体展开图
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Natural Numbers
Congruence
Statistical Characteristics
Linear Regression
Quadratic Equations