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垂線作圖
Author:
Ray
GeoGebra
New Resources
兩位數除以一位數（二）
兩位數加法
【案例】圆柱体内放置一个大球六个小球
四邊形的特性
兩組對邊相等和有直角的四邊形
Discover Resources
平行四邊形的面積
test1(尋找北極星)
斜線
gjc090c23 圓內三角形與角度
Graph of Trigonometry
Discover Topics
Arithmetic
Cosine
Coordinates
Arithmetic Mean
Hypothesis Testing