To determine whether the angles \( m\angle A = 37^\circ \) and \( m\angle B = 143^\circ \) are supplementary, we need to check if they add up to \( 180^\circ \).
Calculating their sum: \[ 37^\circ + 143^\circ = 180^\circ \]
Since their sum equals \( 180^\circ \), the angles are considered supplementary.
The correct response is: Yes, they are a supplementary pair.