I don't understand the question
you have negative -12
turn this into a positive (12)
12 plus 18
= 30
Ex.
f + g = y
-----------
3
3(f+g) = (y) 3
--------
3
f + g =3y
f - f + g = 3y - f
g = y - f
Answer:
Each interior angle of a polygon equals:
180 degrees - (360 / number of sides)
180 - (360 / 6)
= 180 -60
= 120 degrees
http://www.1728.org/polygon.htm
Step-by-step explanation:
