This is a 9 slide PowerPoint Presentation. It goes over vocabulary words (circle, center, radius, diameter, chord, central angle, and circumference). It gives examples and includes animations in order to allow students to try answering/naming the specified part before the answer makes an "entrance" into the slideshow. There is also a youtube video link as well as a link to provide your students with a "brain break" My kids loved this. I hope your students do as well.