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任务9：内凹的正方形
Author:
陈丽婷
GeoGebra
New Resources
正方形雪花图案
龙形曲线-分形龙
盈利與虧蝕
科氏力 (Coriolis Force)
活动三：应用性质
Discover Resources
Example 1
第一本
quiz 9.1 2(a)
推移矩陣（x 方向）
比較角的大小三
Discover Topics
Fractions
Trapezoid
Equilateral Triangles
Inequalities
Right Triangles