Design Example of Pentagon Shaped Box Analysis III

8. Use intersection once again, so that you get a pentagon that is tangent to the circle;

9, In ​​order to make this pentagon look positive, I draw another figure larger than this pentagon, and once again intersect with this pentagon, so that I get a five-sided shape;

10, Next step: Make the thickness of the box, this is 76mm, in order to get the accurate side length, I copied a copy of the pentagon in situ, and pulled out the extra points to delete it;

11, then copy this side by a distance of 76mm, and use a pen to connect the two lines to form a quadrilateral;

(to be continued)