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扇形面積
Author:
madeleineleung0928
GeoGebra
New Resources
三位數除以一位數（二）
第八周作业
兩組對邊相等和有直角的四邊形
異分母分數減法
画直线等分三角形的面积
Discover Resources
龍騰4_1-1課例2
曲柄滑塊
四下_面積（一）(學生版)
圖形的周界
Completing the square(配方法)
Discover Topics
Pythagoras or Pythagorean Theorem
Addition
Surface
Arithmetic
Binomial Distribution