'Side Angle Side' is a music video featuring students in the Methodist College, Hong Kong, released on 18th Apirl, 2016, via the school's Facebook page, MCKLN Secrets. The video consists of three students going around the campus, singing 'Side angle side, side side side. Angle side angle, angle angle side' to the melody of west German band Silver Convention's 'Fly, Robin, Fly' repeatedly. As of 20th April, 2016, the video has already accumulated over 1.5 million views, and has spread like wildfire in Hong Kong.

Synopsis
'Side angle side' revolves around a trio of students, who go by the name 'R.H.S.' ,dancing while singing 'Side angle side, side side side. Angle side angle, angle angle side', the four main ways to prove the congruence of two triangles. They start from a classroom, then repeat the same process in different places around the campus, like the library, the hallway and the staircase. The group then play out the tone with brass instruments in the music room. Finally, they sing the entire song again on the school hall's stage, along with all the other students and teachers.

Reaction
While some praise the video to be ' innovative' and is a 'good way to learn Maths', others criticize the song to be 'repetitive'. In particular, local newspaper Apple Daily mentions that some even call it 'brainwashing', as it was the same phrase over and over again.

The idea is said to have been conceived by a school mathematics teacher, Mr Leung Chi-kit, in September 2014.

The school’s principal, Miss Wong Pui-yi, said she was surprised at the huge response to the video.

The three boys are said to have joined the video shoot voluntarily, although some sources say that they had to choose between shooting this video or detention

References
1) South China Morning Post:
www.scmp.com%2Fnews%2Fhong-kong%2Feducation-community%2Farticle%2F1937281%2Fmaths-fun-and-groovy-hong-kong-pupils-music-video&usg=AFQjCNGTKJafSqW7baBAXJGh8hUVEoex5w&sig2=1oCjsvmmU_Nl5xQ0dnBiFA

2) EJ Insight:
http://www.ejinsight.com/20160420-maths-song-featuring-three-hk-students-goes-viral/

3) Apple Daily
http://hk.apple.nextmedia.com/enews/realtime/20160419/55004882