How do I bend part of this model at an angle?

I'm working on modeling some components of a lawnmower assembly, and the part I'm currently doing is the blade. I need to bend a portion of it down at an angle, but I'm having a hard time figuring out a way for that be done. I've attached a screenshot with the needed area to be bent circled in blue. This is in Creo Parametric 2.0.