Similar to Mitochondria is the Powerhouse of the Cell, this meme is reflects the useless nature of most things taught in school.

https://knowyourmeme.com/memes/mitochondria-is-the-powerhouse-of-the-cell

In Algebra I, calculating the central angle measures of a circle is considered an essential skill. This involves multiplying the percentage of the area given to the total area, giving an answer that is almost always easier to approximate by simply looking at the image. Thus, this is dreaded by high school students.

The meme was first spread via Google+ when an student took a photo of this math problem during class.