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劉虹圻 垂心
Author:
呂麗珠
Topic:
Orthocenter
GeoGebra
New Resources
畫出對稱圖形
四邊形的特性
兩位數除以一位數（二）
算柱 (兩位數)
球体的体积推导（优化版）
Discover Resources
畢達哥拉斯定理
判斷線型函數y=f(x)=ax+b的b值(隨機出題)
摩天輪
zentangle
畫等腰直角三角形 題3
公平的切蛋糕 Selfridge-Conway 免嫉妒分法(envy-free cake-cutting)
Discover Topics
Calculus
Sine
Set Theory
Trigonometric Functions
Confidence Interval