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梯形的高
Author:
鍾文欽
Topic:
Trapezium
GeoGebra
New Resources
兩組對邊相等的四邊形
判斷球體
球体的体积推导（优化版）
球體建築師
【案例】2013年安徽高考15题
Discover Resources
費式數列
指數函數的圖形(1)
Heat Sink Fin
盒子的體積的副本
Illusion-若隐若现的白点
Discover Topics
Sine
Special Points
Prism
Set Theory
Sequences and Series