coplanar parallel lines

This image is a wooden picket fence. This fence shows parallel lines on the same plane. Each wood plank is parallel to the next. This image was found on a lawn (common place to find them) it is commonly used as security. Other uses of picket fences include decoration and, at one time, around baseball fields.

-       I took this photo

-       This photo corresponds with the security industry because it keeps dogs on or off a yard, securing the area.