Answer:
Octagon
Step-by-step explanation:
Because, an octagon has eights. so, using the formula:
s=(n-2)180
s=(8-2)180
s=(6)180
s=1080
Therefore, now you divide the sum of its interior angles by its number if sides:
1080÷8=135
Giving us the sum of each interior angle of an octagon.
