Answer:
D) 151°
Explanation:
First we recall the fact that angles in a triangle add to 180°
So this means that we can find the angle above 's'
61° + 90° + ? = 180°
151° + ? = 180°
? = 29°
So the angles above 's' is 29°
Then we recall the fact that angles on a straight line add to 180°
So this means that
s + 29° = 180°
s = 151°