The supplementary angle is an angle x that adding to 59° 00'17 " give as 180°
So, x can be calculated as:
x + 59° 00'17 " = 180°
x = 180° - 59° 00'17 "
First, we need to write 180° as 179° 59' 60", so the subtraction is equal to:
So the supplementary angle is 120° 59' 43"
Answer: 120° 59' 43"