Create an Octagon From a Square

Draw a square, which is used to draw this octagon.

Step 1: Divide Into Thirds

Divide the lengths into thirds. However, if you want a regular octagon, the lengths must be around the ratio 7:10:7.

Step 2: Split Into 9 Squares

Draw along the markings to create 9 small squares.

Step 3: Make an Octagon in the 9 Squares

Draw lines such that the octagon can be seen in the 9 squares.

Step 4: Erase Forming the Octagon

Erase the unneeded sides such that it forms an octagon.