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平行四邊形面積
Author:
曾己泉
Topic:
Parallelogram
平行四邊形的面積＝底 x 高
GeoGebra
New Resources
拼砌四邊形
兩位數除以一位數（二）
三位數除以一位數（二）
異分母分數減法
兩組對邊相等和有直角的四邊形
Discover Resources
Addition and Subtraction of Directed Numbers (2) 有向數加減(2)
軌跡,摺紙,滾動,實驗觀察,曲線
Question 8
梯形堆垛
勾股定理III 基於歐基里德(Euclid)的證明
圆锥曲线
Discover Topics
Inequalities
Arithmetic Mean
Trapezoid
Real Numbers
Triangles