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sum of interior angle
Author:
cheung shan ni
Topic:
Angles
ok done
GeoGebra
New Resources
找出對稱軸
算柱 (兩位數)
兩位數加法
三位數除以一位數（二）
異分母分數減法
Discover Resources
圖D
圓圈圈
切割正四面體
旋轉長方形
三角形的底和高
Discover Topics
Cylinder
Polynomial Functions
Polygons
Ellipse
Confidence Interval