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多普勒效应动态演示
Author:
孟宝兴
GeoGebra
New Resources
找出對稱軸
兩組對邊相等和有直角的四邊形
畫出對稱圖形
【案例】2018年全国1卷理科12题
球体的体积推导（优化版）
Discover Resources
釘點紙畫三角形
坐標測驗
三條線上的三角形
HW question locus 3
實數相乘相加的幾何意義(數線上)
Discover Topics
Arithmetic Operations
Cuboid
Surface
Numbers
Rectangle