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平均線
Author:
Tsang Ngan
GeoGebra
New Resources
長方體平面投影 (Codex版)
Earth with coastline
球體建築師
近似值：有效數字
判斷球體
Discover Resources
speed
大圓在小圓上滾動
Properties of a Rhombus
推移矩陣（x 方向）
橢圓的副本
Discover Topics
Vectors 3D (Three-Dimensional)
Means
Rotation
Percentages
Hyperbola