Supplementary angles that are not a linear pair

An example of supplementary angles that are not a linear pair is shown in the picture above. The corners of this phone box are ninety degree angles, which add up to 180 degrees. Two angles that add up to 180 degrees is called a supplementary angle. The reason why this example is not a linear pair is because they are not adjacent angles formed by two intersecting lines. The two angles that are supplementary are in pink. Phones are very important in the way humans communicate today. Phones offer a lot today including text messaging, email, internet access, business applications, gaming, photography, and much more. I took this photo.