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外心

Author:王廷祐

New Resources

算柱 (兩位數)
兩組對邊相等的四邊形
三位數除以一位數（二）
四邊形的特性
兩組對邊相等和有直角的四邊形

Discover Resources

二項分佈
中線
tanx & cotx
C60足球模型（多边形）
函數的極限 (The Limit of a Function)

Discover Topics

Pythagoras or Pythagorean Theorem
Volume
Cone
Definite Integral
Tree Diagrams

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