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Author:
GaryLee
GeoGebra
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近似值：有效數字
拼砌四邊形
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
Discover Resources
vector addition and subtraction
最小周長
摩天輪
Locus (Parallel lines)
MFS: Rebound 2
Discover Topics
Logic
Bar Chart or Bar Graph
Reflection
Trigonometric Functions
Circumcircle or Circumscribed Circle