vb.net绘制图形，将圆周等分为12等份，过最低点与其余各等分点连接

您可以使用VB.NET中的System.Drawing命名空间中的Graphics类来绘制图形。下面是一个示例代码，可以将圆周等分为12等份并连接最低点和其他等分点。

Private Sub DrawShape()
    Dim centerX As Integer = 200 '圆心X坐标
    Dim centerY As Integer = 200 '圆心Y坐标
    Dim radius As Integer = 100 '半径
    Dim angle As Double = 2 * Math.PI / 12 '每个等分点间的角度

    Using g As Graphics = Me.CreateGraphics()
        Dim pen As Pen = New Pen(Color.Black, 3) '设置画笔颜色和宽度

        '绘制圆形
        g.DrawEllipse(pen, centerX - radius, centerY - radius, radius * 2, radius * 2)

        '绘制最低点
        Dim lowestPoint As Point = New Point(centerX, centerY + radius)
        g.DrawLine(pen, centerX, centerY, lowestPoint.X, lowestPoint.Y)

        '绘制等分点并连接
        For i As Integer = 1 To 11
            Dim x As Integer = centerX + Convert.ToInt32(radius * Math.Sin(i * angle))
            Dim y As Integer = centerY + Convert.ToInt32(radius * Math.Cos(i * angle))
            Dim point As Point = New Point(x, y)
            g.DrawLine(pen, lowestPoint, point)
        Next
    End Using
End Sub

在此示例中，我们使用Math.Sin和Math.Cos函数计算每个等分点的X和Y坐标。使用DrawEllipse方法绘制圆形，使用DrawLine方法绘制直线。最后，我们在Using语句块中使用Graphics对象和Pen对象进行绘制。