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平行四邊形
Author:
謝昀潔
GeoGebra
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兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
美國國旗 (Codex 版)
直角坐標平面上的旋轉變換
第八周作业
Discover Resources
Roger Test Draw
ghseh 二次函數描點法
(3D) Tasks: Pyramid, Paper folding & Solid of revolution[20170615]
小船平移2
赵爽弦图
Discover Topics
Fractions
Indefinite Integral
Perimeter
Tree Diagrams
Polygons