The last one, opposite sides parallel and congruent theorem
First put both in fraction form
7/12
2/1
use the reciprocal of the second term and multiply
7/12*1/2
7/24
24 divided by 4 is 6, five plus one equals six, so the answer is five
The <em><u>correct answer</u></em> (though it is not one of the choices) is:
Alternate Interior Angles Theorem.
Explanation:
Alternate interior angles are angles that are inside the parallel lines and on opposite sides of the transversal. Treating BA as a transversal, ∠DBA and ∠BAC are both inside the parallel lines and on opposite sides of BA, the transversal. This makes them alternate interior angles, and means that they are congruent.