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三角形三边关系
Author:
acchu
GeoGebra
New Resources
垂直線的斜率
平行線的斜率
直線的斜率
兩位數除以一位數（二）
兩位數除以一位數（一）
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優良作品8(宜庭)
四次函數圖形觀察
各種三角形
小三_垂直
sin的平移與伸縮
Discover Topics
LCM and GCD
Solids or 3D Shapes
Polygons
Sequences and Series
Rotation