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菱形的特性
Author:
felixchow
GeoGebra
New Resources
兩組對邊相等的四邊形
拼砌四邊形
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
算柱 (兩位數)
Discover Resources
Lagrange
初犯九點圓
S5 Locus
Ladder on Wall
比較數量-1
Discover Topics
Planes
Differential Equation
Linear Regression
Pie Chart or Circle Chart
Equilateral Triangles