Fast way to fix angles to a shape?

Hello! 

Is there a quick way to adjust the angles of a shape? I have a bunch of shapes that should be at 90 degrees but they aren't. So the only way I know how to fix that is to move the anchor points 1 at a time, which isn't hard, but there are a few hundred shapes I need to correct. 

Background: I'm working on an ArcGIS file with many buildings. The project I'm working on requires the geometry of the building footprints to be fairly accurate. Any advice would be greatly appreciated 🙏