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内外弦图
Author:
叶明杰
GeoGebra
New Resources
三位數除以一位數（二）
四邊形的特性
找出對稱軸
拼砌四邊形
算柱 (兩位數)
Discover Resources
垂心即內心
算幾不等式
No.2
拋物線3--平行四邊形法
活工(三)Q2
Discover Topics
Geometric Transformations
Linear Equations
Matrices
General Quadrilateral
Pyramid