尺规作图，画正五边形：先画一圆，再确定内接于圆的正五边形的边_哔哩哔哩

Name: %E5%B0%BA%E8%A7%84%E4%BD%9C%E5%9B%BE%EF%BC%8C%E7%94%BB%E6%AD%A3%E4%BA%94%E8%BE%B9%E5%BD%A2%EF%BC%9A%E5%85%88%E7%94%BB%E4%B8%80%E5%9C%86%EF%BC%8C%E5%86%8D%E7%A1%AE%E5%AE%9A%E5%86%85%E6%8E%A5%E4%BA%8E%E5%9C%86%E7%9A%84%E6%AD%A3%E4%BA%94%E8%BE%B9%E5%BD%A2%E7%9A%84%E8%BE%B9
Uploaded: 2025-07-09T18:27:45.444Z