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Author:
Cychoy
GeoGebra
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兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
球體建築師
兩位數除以一位數（二）
GeoGebra笔记功能体验课件
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一題多解,托勒密,代數,三角,柯西,鍾元杰
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
圓心角
鉛筆畫圓
擲兩個硬幣的機率分布的副本
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Polygons
Optimization Problems
Pie Chart or Circle Chart
Linear Programming or Linear Optimization