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围棋（可摆盘、双人对战，不可人机对战）
Author:
阳光
Topic:
Constructions
GeoGebra
New Resources
找出對稱軸
算柱 (兩位數)
sanjiaohanshu
四邊形的特性
拼砌四邊形
Discover Resources
Net of a cone
Copy of 圓方程 (標準式與一般式)
gslsj 橫向的三角數列
扇形面積公式2
拋物線5--包絡線法
Discover Topics
Rhombus
Tree Diagrams
Circle
Pie Chart or Circle Chart
Vectors