Final answer:
Without additional information or a diagram, we cannot determine the sum of the measures of angles ∠1 and ∠2; therefore, a correct answer cannot be provided from the options listed.
Step-by-step explanation:
The question requires us to add the measures of angles ∠1 and ∠2. However, adequate information to calculate these angles is not provided. Without additional context or a diagram, we cannot determine the sum of the measures of angles ∠1 and ∠2. Therefore, it is not possible to select a correct answer from the options provided (a) 120°, (b) 110°, (c) 131°, or (d) 140°.