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0926同心圓環帶塗色border操作
Author:
lee chao ming
GeoGebra
New Resources
斜率的值
直線的斜率：水平變化 & 鉛垂變化
垂直線的斜率
常见四边形是否是双心四边形
多邊形的面積
Discover Resources
Symmetric設計對稱圖案(兩條對稱軸)(斜)
繪製常數函數圖形(隨機出題)
串珠
椭圆的定义
椭圆的光学性质
Discover Topics
Curve Sketching
Rectangle
Dilation
Prism
Cone