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Doppler Effect and Shockwave
Author:
王一哲
GeoGebra
繪圖教學
https://hackmd.io/@yizhewang/SyrusFx9r
New Resources
四邊形的特性
拼砌四邊形
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
畫出對稱圖形
Discover Resources
平行四邊形
軌跡觀察---圓上正三角形中心軌跡
y=sinx对称中心
正方体展开图的副本
表内乘法
Discover Topics
Hyperbola
Diagrams
Trigonometry
Centroid or Barycenter
Differential Calculus