There is a 25% decrease because the decrease is 30, which is 25% of 120.
Answer:
x = 30
Step-by-step explanation:
a) The sum of the angles along the line is 180°. That means ...
2x° +90° +x° = 180°
__
b) Subtracting 90° and dividing by 3° gives ...
3x° = 90°
63
21
Answer: its 23 meters
