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平方练习
Author:
acchu
GeoGebra
New Resources
直線的斜率：水平變化 & 鉛垂變化
比較五件物件的重量
盈利與虧蝕
龙形曲线-分形龙2
活动三：应用性质
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動態文字2次函數
Tangent from an external point
三角四星
密铺图形
弦的垂直線何時平分弦活動?
Discover Topics
Dilation
Arithmetic Operations
Sphere
Line Segment
Probability