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定周长的正多边形面积变化规律（含圆）
Author:
张英华
Topic:
Area
GeoGebra
New Resources
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
三位數除以一位數（一）
畫出對稱圖形
兩組對邊相等和有直角的四邊形
Discover Resources
Quiz on Compass Bearings 羅盤方位角：測驗
Maths p1
semops_圓錐
複合棒形圖
表示數線上的位置的副本
Discover Topics
Fractions
Secant Line or Secant
Hypergeometric Distribution
Differential Calculus
Pythagoras or Pythagorean Theorem