Respuesta :

Answer:

43°

Step-by-step explanation:

Supplementary means that they add up to 180

so m∠1 + m∠2 = 180

137 + m∠2 = 180

m∠2 = 180 - 137

m∠2 = 43

Answer:

43 degrees

Step-by-step explanation:

180-137=43