What shape is the piston in a "Wankel" engine?

More Questions:

What national news magazine published its first issue in February 1933, as a competitor of "Time"?

What Boston Celtic great was nicknamed "Hondo"?

Which city staged the premier of "Gone with the Wind" that actress Hattie McDaniel couldn't attend due to her skin color?

What decade was Agatha Christie's "Murder on the Orient Express" set in?

What are the characters Vladimir and Estragon always waiting for?

'Understood Betsy" was a book published in 1918 by what author?

Which Australian state was formerly known as Van Diemen's Land?

In what country would you find the mouths of the Orinoco river?

Which US state is nicknamed the "Peach State"?

In what movie does Redfoot flick his cigarette into the face of McManus?

Whose tomb did Howard Carter discover in 1922?

Which country hosted the Olympic Games In 2004?

Despite being fought by European countries, what modern-day country did the Battle of the Plains of Abraham take place?

What US state was first to legalize same-sex marriage?

Who created the "Fantasic Four" superhero team?