The figure below shows a parallelogram PQRS: A parallelogram PQRS is shown with the diagonal SQ.

The flowchart shown below shows the sequence of steps to prove the theorem: Opposite angles of a parallelogram are equal:

The flow chart has one box in the first column, two boxes in the second column, three boxes in the third column, and two boxes

Which is the missing statement? (6 points)

Angle 1 is equal to angle 6
Angle 5 is equal to angle 3
Angle 5 is equal to angle 6
Angle 4 is equal to angle 3