Figure out if its an Obtuse Angle Triangle (IConstructAngle)

Discussion created by vbothello on Jul 18, 2012
Latest reply on Jul 20, 2012 by FZhang-esristaff
I have three points from which I create a triangle, I use IConstructAngle constructThreePoint to get the angles of the triangle, my angles are returned as a double . Is there a way to tell if this in and obtuse angle triangle?  I seem to have forgotten my math.

       GeometryEnvironment geometryEnvironment = new GeometryEnvironment();
       IConstructAngle constructAngle = geometryEnvironment ;
       constructAngle.constructThreePoint(point1, point2,point3);

thanks Dan