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parallelogram
Author:
iedc
GeoGebra
New Resources
找出對稱軸
畫出對稱圖形
sanjiaohanshu
長方體平面投影 (Codex版)
拼砌四邊形
Discover Resources
利用對摺找內心
Similar triangles inscribed iteration
碎形
碎形三角形
正三角形的一边在正n边形上滑动时顶点的动态轨迹
Discover Topics
Quadratic Functions
Quadrilaterals
Surface
Straight Lines
Trapezium