private double DegreeOfInstability(SolarSystem solarSystem) { var x1 = solarSystem.Ferengi.CoordinateX; var y1 = solarSystem.Ferengi.CoordinateY; var x2 = solarSystem.Betazoid.CoordinateX; var y2 = solarSystem.Betazoid.CoordinateY; var x3 = solarSystem.Vulcan.CoordinateX; var y3 = solarSystem.Vulcan.CoordinateY; return(Perimeter.Triangle(x1, y1, x2, y2, x3, y3)); }