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長方形的周界與長和闊的關係 (教師版)
Author:
Anthony OR 柯志明
Topic:
Perimeter
https://www.geogebra.org/m/qfuekenq
New Resources
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sanjiaohanshu
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三位數除以一位數（二）
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等量公理
myFirstGeoGebra
Quiz on Special Lines in Triangles 三角形內的特殊線：測驗
拋物線教學_2016
立体几何
Discover Topics
Cube
Angles
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Pythagoras or Pythagorean Theorem