Answer
$m \angle A = 53^{\circ}$
Work Step by Step
The diagram is that of a parallelogram.
Consecutive angles of a parallelogram are supplementary, meaning their sum equals $180^{\circ}$. We see that $\angle A$ and $\angle B$ are supplementary.
Let's set up an equation to find $m \angle A$ using this information:
$m \angle A = 180 - m \angle B$
Let's plug in what we know:
$m \angle A = 180 - 127$
Subtract to solve:
$m \angle A = 53^{\circ}$
