If a quadrilateral is a ______________________, then each _______________________ intersects the other ________________________
at its ______________________. Because this is so, we can say that the_____________________ of a ________________ also ______________________ each other.
If a quadrilateral is a parallelogram, then each intersects the other ________________________ at its ______________________. Because this is so, we can say that the_____________________ of a ________________ also ______________________ each other.
