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三角形有向面積
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
兩組對邊相等的四邊形
找出對稱軸
四邉形 (四年級) 教師版
球體建築師
錐體建築師
Discover Resources
Area of Trapezium
y=Sin(x)伸縮平移
随机模拟实验（撒豆子估算π）的副本
保持比例
繪畫四邊形
Discover Topics
Logarithmic Functions
Parallelogram
Trigonometry
Tangent Function
Rational Numbers