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三角形面積公式 1/2 bc sinA
Author:
羅驥韡 (Pegasus Roe)
Topic:
Area
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
異分母分數減法
拼砌四邊形
柱體建築師
兩位數除以一位數（一）
Discover Resources
圍棋名人賽
test for fun
內心
平行四边形平移
圓周公式的應用
Discover Topics
Trigonometric Functions
Differential Equation
Boxplot
Numbers
Centroid or Barycenter