Answer
38 mm
Work Step by Step
The perimeter is the sum of the lengths of the sides. Since the octagon has 8 equal sides, you can multiply the length by 8 to find the perimeter.
$4.75\ mm\times8=38\ mm$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.