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tetrahedron_refection
Author:
KHMATH
GeoGebra
New Resources
球体的体积推导
判斷球體
兩位數加法
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（一）
Discover Resources
ray tracing 2 lens
三角形，邊上平分面積
Fractal Spirograph (Fractal Roulette)
讀磅
二進位翻牌
Discover Topics
Rational Numbers
Ellipse
Upper and Lower Sum or Riemann Sum
Area
Triangles