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六下：圆柱展开图（2）
Author:
钟秀群
,
孟宝兴
正圆柱展开图
GeoGebra
New Resources
Earth with coastline
世界平面地圖 (Codex╱2026.10.07)
近似值：有效數字
直角坐標平面上的旋轉變換
湖南省张毅郴数字教研工作室 logo
Discover Resources
蝴蝶線 butterfly line
動畫
等腰三角形外接圓上弦AB
Question 2
二分法优化版（视频教程见https://www.bilibili.com/video/BV1ST4y1F78g）
Discover Topics
Right Triangles
Linear Programming or Linear Optimization
Calculus
Curve Sketching
Trigonometric Functions