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初犯九點圓
Author:
XIE Yuheng
Topic:
Geometry
九點圓
GeoGebra
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兩位數除以一位數（二）
第八周作业
兩組對邊相等和有直角的四邊形
拼砌四邊形
小数 的副本
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Special Lines & Centres of Triangles 三角形的特殊線和中心
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
P6 圓周03B
Ｑ５
勝者即正義
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Scalene Triangles
Prism
Optimization Problems
Trigonometry
Similar Triangles