Thanks for your question! I have reached out to the designer to get your answer and will let you know as soon as I hear back from him!

The designer was not able to access the electronic design files because we have since shifted to a new design program. He was confident however that the angles were 45's and thhat the end of the peninsula with the 3 chairs was approximately 60" in length. Hope that helps you some!

It looks like it is closer to 72 inches if not a bit longer based on comparing it with other typical dimensions in the room (i.e. The fridge and cabinet next to it, and the peninsula seems to almost line up with them) and using the 24 inches per seat rule to accommodate 3 seats.