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折正三角形
Author:
cherry910502
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
找出對稱軸
四邊形的特性
四邉形 (四年級) 教師版
拼砌四邊形
Discover Resources
scalar multiplication
Area of Triangle
配方法圖解
三年級除法(一)：一位數除兩位數
展開圓面積 (講義版)的副本
Discover Topics
Arithmetic Mean
Functions
Sphere
Isosceles Triangles
Ellipse