Line perpendicular to a plane

This object is a flagpole. It is a pole that sticks strait up out of the ground, and is used to hang a flag as a symbol of a country. Flagpoles are also used to send distress signals, such as hanging a US flag upside-down. This object represents a line perpendicular to a plane because the pole itself sticks right up,our of the ground at a right angle, so the pole is perpendicular to the ground. This photo was also 

found on google images, in the URL http://www.gettysburgflag.com/index-Poles.php.

Supplementary angles. Not a linear pair

This object is a carpenter's square, a very useful tool. It shows a pair of supplementary angles that are not a linear pair, because of its perfectly right properties. The carpemter's level is used to measure if a corner forms a right angle, and so, there is more than one right angle inside it. This picture was obtained from the URL http://www.daviddarling.info/encyclopedia/C/AE_carpenters_square.html, using google images. 

Parallel lines

This picture is of three coplanar parallel lines. It is found in one of the Nazca drawings, on the Nazca Plain. This picture was obtained from google images, under the URL http://www.bbxrafting.com/nazca-lines. This object shows parallel lines in the bird's tail, where the lines that make the feathers have the same slope, do not intersect, and are in the same plane. In the real world, this picture is visited by tourists every month, because it was made hundreds of years ago,and it is a great mystery how the natives did it without planes or a way to monitor their work from the air.