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3.5.1Projectivity and Perspectivity
Author:
代国兴
GeoGebra
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兩位數除以一位數（二）
兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
找出對稱軸
四邉形 (四年級) 教師版
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Clock
Transit of Venus - Pentagram
頂點法
三角形全等的理由 – 題3的副本
圆台的侧面展开动画
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Hyperbola
Quadrilaterals
Tree Diagrams
Trapezoid
Equations