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平行四邊形和長方形的大小
Author:
杜寶茵
GeoGebra
New Resources
GeoGebra笔记功能体验课件
算柱 (兩位數)
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
球体的体积推导（优化版）
Discover Resources
Rectangle _03
陳柄何的GGB book
數值滑桿
重複排列
双动点变速运动
点动成线
Discover Topics
Straight Lines
Integers
Square
Ratios
Quadratic Functions