Careful, when you delete an account they just mark the username as [deleted] and claim it sufficiently anonymizes the data. Explicitly tell them to delete all comments or at least send then a specific list of comments with anything identifiable.
Time to request full gdpr info. Also they don’t delete your posts if you request account deletion and tell you to do it yourself.
After the request tell them through an E-Mail to delete every single comment with remotely identifiying info for you since you dont have access.
The 180° angle is just a (really weird) way of representing a long, straight, line. The rest of the angles add up to 180°.