To determine if angles A and B are supplementary, we need to check if their measures add up to 180 degrees.
Given:
- \( m∠A = 98° \)
- \( m∠B = 88° \)
Now, let's add the two angles together:
\[ m∠A + m∠B = 98° + 88° = 186° \]
Since 186 degrees is greater than 180 degrees, angles A and B do not add up to 180 degrees. Therefore, the correct response is:
No, they do not add up to 180 degrees.