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平行四邊形
Author:
Ching-Hui Chou
Topic:
Parallelogram
GeoGebra
New Resources
画直线等分三角形的面积
球體建築師
直角坐標平面上的旋轉變換
判斷球體
三位數除以一位數（一）
Discover Resources
減法運算
Redefining Trigonometry by a Unit Circle
有多少正方体
拋物線 (丹德林球)
直角坐标系与极坐标系的转换
Discover Topics
Quadratic Equations
Derivative
Exponent
Median Line
Equilateral Triangles