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Angle Sum in a Triangle
Author:
ksarnoff
,
Koo Wing Yan
Topic:
Angles
Angle Sum in a Triangle
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
畫出對稱圖形
三位數除以一位數（二）
算柱 (兩位數)
球體建築師
Discover Resources
Difference of Two Squares 平方差 (2)
增長的圓
三角形重心軌跡(動點在三圓上)
總結
分段函数和旋转曲面
Discover Topics
Upper and Lower Sum or Riemann Sum
Normal Distribution
Ratios
Symmetry
Median Line