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平行四邊形面積(9)
Author:
官長壽(longlife)
GeoGebra
New Resources
龙形曲线-分形龙
活动三：应用性质
科赫雪花
折扣
平行線的判定
Discover Resources
平移旋轉
總結
Distance(距離公式)
橢圓2-四圓心近似法
模板
Discover Topics
Planes
Correlation
Quadratic Equations
Random Variables
Differential Equation