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Comparing fractions using number lines and rectangles
Author:
Eva Lai
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
四邊形的特性
柱體建築師
算柱 (兩位數)
兩位數除以一位數（一）
Discover Resources
三角函數圖形（全）
立體錯覺樓梯(使用透視法會稍有差距)
(3D) Tasks: Pyramid, Paper folding & Solid of revolution[20170615]
傅里叶级数 Fourier series
半圆面积的微积分动态演示.许兴华数学
Discover Topics
Stochastic Process or Random Process
Angles
Similarity Transformation or Similarity
Rectangle
General Quadrilateral