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Author:
林彥均
GeoGebra
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算柱 (兩位數)
四邊形的特性
兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
兩位數加法
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[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
p10-4
ghk106a18 三角形的外心與正方形
Copy of Quiz on Compass Bearings
兩位數除以一位數（二）
Discover Topics
Arithmetic
Percentages
Sequences and Series
Indefinite Integral
Centroid or Barycenter