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探究平行四邊形的特性
Author:
Ng KC
GeoGebra
New Resources
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
四邊形的特性
第八周作业
Discover Resources
題二
平方求和V 庄皮春 (Pi-Chun Chuang)
整数乘法演示
算盘
美丽的斯坦纳圆链
Discover Topics
Vectors 3D (Three-Dimensional)
Rhombus
Bar Chart or Bar Graph
Pythagoras or Pythagorean Theorem
Upper and Lower Sum or Riemann Sum