Respuesta :

Answer: k = 59°

Steps:
180 - 77 = 103

103 + 18 + k = 180
121 + k = 180
k = 180 - 121
k = 59

Check:
103 + 18 + k = 180
103 + 18 + 59 = 180
180 = 180 ✅
Jsf09

Step-by-step explanation:

180-77 = 103

103+18 = 121

k = 180-121 = 59