摘要： Private Function GetCenOf3Pt(pt1 As Variant, pt2 As Variant, pt3 As Variant, ByRef radius As Double) As Variant''''根据三点计算出圆心和半径Dim xysm, xyse, xy As DoubleDim ptCen(2) As Doublexy = pt1(0) ^ 2 + pt1(1... 阅读全文