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线段错觉
Author:
军云
GeoGebra
New Resources
兩位數除以一位數（二）
兩位數除以一位數（一）
拼砌四邊形
兩組對邊相等和有直角的四邊形
【案例】圆柱体内放置一个大球六个小球
Discover Resources
Ladder on Wall
BkD_act15_05c
以 Unit Circle 了解 Sine 的正/負的副本
心脏线切线族
圆锥曲线1
Discover Topics
Coordinates
Trigonometry
Volume
Straight Lines
Symmetry