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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
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
球体的体积推导（优化版）
異分母分數減法
畫出對稱圖形
Discover Resources
clock
正四面體
Locus 軌跡(6)
聖者即正義
繡曲線01
Discover Topics
Polygons
Difference and Slope
Fractal Geometry
Real Numbers
Circle