Fill in the blanks.
A __P__ is the path of a point moving at the same distance from a fixed point. The fixed point is the __Q__, the fixed distance is the __R__ and the distance around the circle is the __S__.
| P | Q | R | S | |
| A | Circle | circumfe-rence | centre | radius | 
| B | Circle | centre | radius | circumfe-rence | 
| C | Circle | radius | centre | circumfe-rence | 
| D | Circle | circumfe-rence | radius | centre | 
 of the pizza and Kiara ate 
 of the pizza. What fraction of the pizza was left?
