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正n邊形內接縮小正n邊形
Author:
許清惟
GeoGebra
New Resources
四邊形的特性
異分母分數減法
兩位數除以一位數（二）
四邉形 (四年級) 教師版
拼砌四邊形
Discover Resources
簡單的回饋「笑臉」與「哭臉」
Direct Variation
分段控制
正切與餘切函數
數學素養試題
Discover Topics
Variance
Sequences and Series
Vectors 3D (Three-Dimensional)
Cylinder
Geometry