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勾股定理与余弦定理
Author:
洋葱教研
GeoGebra
New Resources
龙形曲线-分形龙
活动三：应用性质
斐波那契螺旋弧线（表格法）
平行線的判定
科赫雪花
Discover Resources
EX3.18
Similar triangles
二元线性规划的图解法(18.2 例5)
余弦定理的证明
圓與切線
Discover Topics
Tangent Line or Tangent
Definite Integral
Vectors
Circumcircle or Circumscribed Circle
Prism