Question

Which equation can be used to find the perimeter of a regular octagon with sides of length 12?

Answer 1

`Perimeter = 8 xx 12 = 96`

Explanation:

In any regular shape, all the sides are the same length.
Perimeter = the sum of all the sides.

"Perimeter = Side + side +side + ......" for as many sides as the shape has.

For an equilateral triangle: `P = 3 xx "side" = 3s`

For a square: `P = 4 xx "side" = 4s`

For a regular octagon there are 8 equal sides, so

`P = 8 xx "side" = 8s`

A general formula for the perimeter of a regular figure would be:

`P = n xx "side" = nxxs`

`n`= number of sides. and `s`= the length of each side.

IN this case

`Perimeter = 8 xx 12 = 96`