How do i make a octagon?

Question

I have a square that is 170 inches side each and i need to make a octagon. plz help me i need this for a deck. Thank u

Answer 1

Center the sides, measure 42 1/2 inches each way from the center mark, then draw a line to the other side. that should give you the angles and the distances you need.

Answer 2

Hi there, 360 divided by 8 equals 45 degrees. All you need is a protractor and a straight edge. Geometry sixth grade, remember?

Answer 3

an octagon is just two squares of the same size rotated to get 8 angles...