Answer:
x = 60°
Step-by-step explanation:
sum = (n-2) = 180
= (5-2) = 180
it's (5-2) because there is 5 angles.
= 3 = 180
divide both sides and becomes..
= 540
then, you add in all your angles and equal it to 540.
x + (2x) + (3x) + (x + 45) + (x + 15) = 540
collect the like terms.
8x + 60 = 540
subtract 60 from 540.
540 - 60 = 480
divide both sides by 8x.
8x = 480
x = 60°
