Mathematics: Arc, radius, and sector are parts of a(n) _________.?

Questions

What is the name of the belief in the existence of many gods or divine beings?

What is the name of the berlin cabaret where lola lola sang?

What is the name of the board at a race track showing odds and results?

What is the name of the capital of Quebec?

What is the name of the river that runs on the border of california and arizona?