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30度直角三角形
Author:
郭勇
GeoGebra
New Resources
GeoGebra笔记功能体验课件
錐體建築師
拼砌四邊形
三位數除以一位數（二）
找出對稱軸
Discover Resources
Redefining Trigonometry by a Unit Circle
Ex. 10C Q.8b
角平分線作圖1213
pyramid by Mr LO WY
平移圖形後計算面積
Discover Topics
Upper and Lower Sum or Riemann Sum
Mathematics
Quadrilaterals
Triangles
Quadratic Functions