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銳角三角：sin, cos
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
錐體建築師
拼砌四邊形
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（二）
三位數除以一位數（一）
Discover Resources
孔明棋 (Peg Solitare)
ruler
ghseh 二次函數描點法上下平移-6
loci car
圆锥曲线1
Discover Topics
Geometry
Expected Value
Line Segment
Calculus
Perimeter