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正方形與正三角形
Author:
李春培
正方形與正三角形
GeoGebra
New Resources
兩組對邊相等的四邊形
三位數除以一位數（二）
異分母分數減法
拼砌四邊形
三位數除以一位數（一）
Discover Resources
Addition and Subtraction of Polynomials 2 (多項式的加減法2)
area 面積4
khkhk
perimeter of rectangle
正立方體的截面
Discover Topics
Geometric Transformations
Subtraction
Constructions
Straight Lines
Trapezoid