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平行四邊形的高
Author:
whtong
GeoGebra
New Resources
四邊形的特性
拼砌四邊形
球體建築師
兩位數除以一位數（二）
直角坐標平面上的旋轉變換
Discover Resources
兩直線夾角101.11.21
梯形
二項分布 (黑板)
雙曲線的漸近線
鉛筆畫圓
Discover Topics
Difference and Slope
Calculus
Geometry
Binomial Distribution
Normal Distribution