The perimeter of a octagon is the sum of all its sides.
If it's a regular octagon, the perimeter is 8 times the length of one side.
The perimeter is 56.
It is the sum of the lengths of the octagon's eight sides.
The perimeter of an octagon is 64 only if it is a regular octagon and the length of one side is 8. An irregular octagon may or may not have a perimeter of 64 (whatever units of measure you choose to use) depending on what the lengths of the individual sides are.
The perimeter of an octagon that has one side of 2 inches is 16 inches.
perimeter of octagon is 128 cm= 8 * side side of the octagon=128/8=16 cm
Divide the perimeter by eight.
There is no formula for an octagon. There are formulas for figuring out different aspects of an octagon, such as its perimeter, diameter, etc.
You say these things to yourself: -- "The perimeter is the distance all the way around the octagon." -- "The octagon has eight sides." -- "So, if it's a 'regular' octagon, then all the sides are the same length, and each side must be 1/8 of the perimeter." -- If it's not a 'regular' octagon, then it has some longer sides and some shorter ones, and the perimeter doesn't help me find the lengths of the sides.
If a regular octagon has a perimeter of 40cm, then each side is 5 cm.
The length of one side of an octagon, if the perimeter is 6 feet, is 9 inches.