Respuesta :

Answer:

11 degrees

Step-by-step explanation:

90 - 79 = 11
So, as you can see 79 and t can form 90 degrees

79 + t = 90
Minus 79 on both sides
t= 11

s + 79 + 11 + 19 = 180 ( straight line is 180)
s= 71

Hope this helps!