PerpendicularDistance

function PerpendicularDistance(

  const P: TFloatPoint;

  const P1: TFloatPoint;

  const P2: TFloatPoint

):TFloat; overload;

function PerpendicularDistance(

  const P: TFixedPoint;

  const P1: TFixedPoint;

  const P2: TFixedPoint

):TFixed; overload;

function PerpendicularDistance(

  const P: TPoint;

  const P1: TPoint;

  const P2: TPoint

):TFloat; overload;