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折紙畫橢圓
Author:
連琨銘
GeoGebra
New Resources
畫出對稱圖形
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
四邊形的特性
球體建築師
Discover Resources
Area of polygon
正十二面體
一元二次不等式(圖解法)
十分逼近法
橢圓3-平行四邊形法
Discover Topics
LCM and GCD
Distributions
Arithmetic Mean
Linear Programming or Linear Optimization
Rectangle