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测试 = =
Author:
lanyi
bakaRu帮忙看看…… 你可以随意移动A和B两个点，A1和B1会自动移动
GeoGebra
New Resources
美國國旗 (Claude 版)
近似值：有效數字
畫出對稱圖形
四邊形的特性
兩組對邊相等和有直角的四邊形
Discover Resources
四下_面積（一）(教師版)
簡單動畫
gslsj 三角數列
正三角疊代
線性規劃
Discover Topics
Straight Lines
Pythagoras or Pythagorean Theorem
Percentages
Division
Linear Equations