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Ambiguous Cylinder Illusion
Author:
Chenwei Chen
GeoGebra
New Resources
柱體建築師
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
球體建築師
Discover Resources
百分數（小學）：折扣 / 賺賠（Java 版）
長方形和正方形的面積_題F
Version 2
GGB7
cos, sin 與單位圓
Discover Topics
Plane Figures or Shapes
Conic Sections
Straight Lines
Parallelogram
Arithmetic Operations