8*length of side.
The perimeter of a octagon is the sum of all its sides.
There is no formula for an octagon. There are formulas for figuring out different aspects of an octagon, such as its perimeter, diameter, etc.
If it's a regular octagon, the perimeter is 8 times the length of one side.
The perimeter is 56.
If a regular octagon has a perimeter of 40cm, then each side is 5 cm.
If the octagon is not regular, the perimeter could have any value greater than 18 inches. If it is regular, then the perimeter is 8*18 = 144 inches.
The perimeter is 72.
' 8a ' is.
I'm not sure what mile metres are, but a regular octagon with a side of 70 whatevers will have a perimeter of 560 whatevers.
Perimeter = 8*7 = 56 cm
Perimeter = 8*15 = 120 cm
pentagon