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椭圆画法2定义法
Author:
冯伟冀
GeoGebra
New Resources
找出對稱軸
四邊形的特性
柱體建築師
球体的体积推导（优化版）
兩組對邊相等的四邊形
Discover Resources
ie 3
一元二次不等式(圖解法)
GGB分解的按鈕設計
四邊形的特性
画直线等分三角形的面积
Discover Topics
Geometric Distribution
Angles
Sequences and Series
Geometry
Linear Functions