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三角形兩邊內接相似平行四邊形
Author:
Gideon Huang
GeoGebra
New Resources
柱體建築師
三位數除以一位數（一）
球體建築師
找出對稱軸
三位數除以一位數（二）
Discover Resources
圓與切線
二次函數：係數與圖形的變化
切割正十二面體
改變係數觀察多項式圖形
繪畫梯形
Discover Topics
Integers
Functions
Kite
Difference and Slope
Pythagoras or Pythagorean Theorem