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三角比的性質
Author:
Derek CHIU
GeoGebra
New Resources
四邊形的特性
三位數除以一位數（一）
畫出對稱圖形
【案例】2018年全国1卷理科12题
算柱 (兩位數)
Discover Resources
parallelogram and squares
共垂心
一次函數圖形
例题1
數學傳播39卷4期, 平面幾何公式思考
Discover Topics
Geometry
Step Functions
Combinatorics
Scatter Plot
Incircle or Inscribed Circle