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B4 4-1 平行線性質
Author:
AlexWang
GeoGebra
New Resources
Fibonacci Clock
算柱 (兩位數)
拼砌四邊形
美國國旗 (Codex 版)
近似值：有效數字
Discover Resources
海龍公式與內切圓半徑
三角形重心軌跡(動點在三圓上)
F.3 Ch.10 Application of Trigonometry
滑桿動畫
正方体展开图的副本
Discover Topics
Vectors 3D (Three-Dimensional)
Tree Diagrams
Means
Subtraction
Right Triangles