Updating my answer. I don't normally get mad over trivial things, I just try to brush it off and smile. If it's about something very important and someone is being, for example, bigoted, I won't hesitate to tell them that I think they're wrong. It's something I need to work on.
I had really bad anger issues when I was younger, but I've learned to control them. Some things will kinda just bother me now more so than anger me, but I tend to keep it to myself cause I don't like being mean to people. It makes me feel like a bad person.
Depends on the situation but mostly yes.
But if it’s somewhere in which I’m around other people that obviously aren’t my parents or any of my other family members, then I usually get angry on the inside whilst I don’t express it on the outside.