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銳角三角：tan
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
異分母分數減法
画直线等分三角形的面积
柱體建築師
四邊形的特性
兩位數加法
Discover Resources
小二、小三_時間（學生版）
學習單：三角形任一外角與內角關係
Copy of 七巧板
Graph of Exponential function
Is it a condition for //gram?
Discover Topics
Constructions
Conditional Probability
Addition
Difference and Slope
Pythagoras or Pythagorean Theorem