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圆锥的侧面展开图3D动画的副本
Author:
吉顺国
拖动点C
圆锥的侧面展开图是三角形吗？
New Resources
拼砌四邊形
Earth with coastline
判斷球體
算柱 (兩位數)
湖南省张毅郴数字教研工作室 logo
Discover Resources
Area of Triangle_2
電子幾何條（2014）
纏繞圖-五邊形
PMC 2018-19
正立方體切三刀
Discover Topics
Mode
Distributions
Linear Equations
Translation
Prism