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二次不等式△>0且a>0
Author:
桃篮翁
二次不等式△>0且a>0
GeoGebra
New Resources
畫出對稱圖形
兩組對邊相等和有直角的四邊形
球体的体积推导（优化版）
四邉形 (四年級) 教師版
球體建築師
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樞紐問題
用圓作成的三角形
Copy of 梯形
圓周公式應用題2的副本
求公切線段長
Discover Topics
Means
Translation
Difference and Slope
Isosceles Triangles
Trigonometric Functions