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两次折叠
Author:
谢鹏
GeoGebra
New Resources
四邉形 (四年級) 教師版
三位數除以一位數（一）
找出對稱軸
判斷球體
兩位數除以一位數（一）
Discover Resources
Decimal
Locus of mid-point of a variable chord of a circle.
angle at the same segment
拋物線4--焦點法
Area of a cricle by n-polygon
Discover Topics
Trapezoid
Translation
Combinatorics
Pyramid
Standard Deviation