Step-by-step explanation:






Hope this is correct and helpful
HAVE A GOOD DAY!
Answer:
u = (b/hn)
Step-by-step explanation:
The inverse!!
A straight line (180o) is still an angle. Would you be wondering if the question said "Can 179o be a real angle?" No you would simply draw it. 1 degree more and you have 180o and it is an angle as well.
So you have a line that is both a line and an angle with A in the middle.