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GeoGebra
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平行四边形
Author:
茯苓
GeoGebra
New Resources
第八周作业
找出對稱軸
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
Discover Resources
比和比值
Rotational Symmetry - Cube
黎曼和
test
任意角的生成
Discover Topics
Terms
Pie Chart or Circle Chart
Orthocenter
Trigonometric Functions
Vectors 3D (Three-Dimensional)