How to draw circular arcs in VB.NET

I have to generate the following figure according to user fed values. How do I go about drawing the arcs (B-C-F as in figure, circular in nature) given their start point & end point (B & F respectively) & the height from the segment BF? I can do some geometric calculations & get the radius & all, but how do I draw the arc?

I have tried using the Graphics.DrawCurve() method, but it doesn't work as expected. How can I make this method work for circular arcs? Any other workaround is also welcome.

Got it! Thanks @Mitch & @Idle_Mind

Using the builtin DrawArc method of Graphics

Friend Function draw_tank() As Boolean

    ' Create pen. 
    Dim blackPen As New Pen(Color.Black, 3)

    ' Create rectangle to bound ellipse. 
    Dim rect As New Rectangle(100, 100, 200, 200)
    ' Keeping the width & length same (200) we get a circle

    ' Create start and sweep angles on ellipse. 
    Dim startAngle As Single = 225.0F
    Dim sweepAngle As Single = 90.0F

    ' Draw arc to screen.
    Dim myarc As Graphics = Me.CreateGraphics
    myarc.DrawArc(blackPen, rect, startAngle, sweepAngle)

    Return True
End Function

Suggestions/Improvements welcome.

Note - This isn't the actual function from my code.