There was a door, and only one. To get in to watch a play, you had to go through this door where there was a man with a porcelain box collecting money. (This is the origin of the term "box office") When they built the replica Globe in the 1990s the fire marshals were horrified by this arrangement and insisted that the replica have more doors in case of fire. This is interesting, since the original, one-doored Globe was actually destroyed by fire when it was full of people, and the whole audience escaped uninjured through that one door.
poor and rich people went to the Globe theatre.
When it first opened the Globe Theatre could hold about 3,000 people.
train or car
When people used to go and watch perfomances in the Globe, the wealthy, or as you would say "the posh people" would sit on the seats in the theatre.
The Globe Theatre was used for acting out and making people watch plays.
When it first opened the Globe theatre could hold about 3,000 people.
Hence the name.... Globe theatre. Would it make sense if it was a rectangular prism?
People went to the Globe Theatre for the same reason people go to theatres now: to watch plays.
The Globe Theatre is the theatre most often associated with Shakespeare. However, it was not his theatre in the sense that your car is your car. He did not own it although he did have a financial interest in it. It was not the only theatre he had a financial interest in. It is far from the only theatre he acted in; he acted in many others. It was not the only place Shakespeare's plays were seen (although they were performed there) and they played lots of plays by people other than Shakespeare there. Finally, none of his contemporaries would ever have thought of the Globe as "Shakespeare's theatre"; almost certainly it would be "the Burbages' theatre."
they were common people who stood in the pit of the theatre
The standees were called groundlings.
roughly around 1500 people would fit in the globe theatre including the groundlings.