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三角函数
Author:
sk829314
GeoGebra
New Resources
算柱 (兩位數)
拼砌四邊形
找出對稱軸
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
Discover Resources
周界
reflection of tetrahedron
以「時」和「分」報時的副本
相似双子模型（任意三角形）
空间立方体
Discover Topics
Upper and Lower Sum or Riemann Sum
Scalene Triangles
Arithmetic Mean
Plane Figures or Shapes
Tangent Function