The perimeter of a octagon is the sum of all its sides.
Divide the perimeter by eight.
We searched as far below as possible and were unable to find the octagon.
Find the area of an equilateral triangle if its perimeter is 18 ft
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.
for perimeter add up the lengths of the six sides and for area divide the hexagon into six equilateral triangle, find the area of one, and multiply the product by six
You cannot. The perimeter alone does not provide enough information unless the octagon is regular and there is no valid reason to assume that it is.
Find the area of an equilateral triangle that has a perimeter of 21 inches. Round the answer to one decimal place.
measure each edge and times it by eight.
80ft
Just add together its 8 sides
Add up all the sides together