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2024天津9
Author:
常振虎
GeoGebra
New Resources
四邊形的特性
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
畫出對稱圖形
【案例】圆柱体内放置一个大球六个小球
Discover Resources
題八
橢圓1--同心圓法
matrix of rotation transformation
对称拼图游戏
正方形雪花图案
Discover Topics
Cosine
Set Theory
Orthocenter
Multiplication
Parallelogram