What do you call a set of three plays or novels that go together?

What is the name of the item that has three legs and can be attached to a camera for taking pictures?

What do we call someone who can speak German, French, and Spanish?

What do you call something that is three-sided?

The rectangular pizza was cut into three equal pieces. What did Amanda do to the pizza?

The man ran three miles every day and swam in his pool every morning. He was preparing for which big race?

Name the vehicle with three wheels that young children ride.

Name the three-sided figure that can be equilateral.

If you and two friends get together to sing in a talent show, you can be called what?