2. " 1. Tommy drew a quadrilateral. He used a
protractor to measure all four angles of the
quadrilateral. How many pairs of angles must
be congruent for the quadrilateral to be a
parallelogram?

In a quadrilateral, the two pairs of opposite angles are congruent. One of the properties of any quadrilateral is that the opposite angles must be congruent.

Step-by-step explanation:

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square