Answer:
degrees
Step-by-step explanation:
Angles on a straight line add up to 180 degrees.
Thus,
Divide both sides by 4:
13 units....................YES
The mean of the answer is 20.5 because you add all of the number together and divide by 6 because there's 6 numbers.
I'm sorry, but I don't know how to do the standard deviation...
Hope this helped!