Uploaded December 2016 | Updated September 2026, 2 hours ago

---

FACEBOOK PAGE: facebook.com/randommathsinc

We find out why the bond angle of methane is 109.5° using some vectors.

Making methane on paint: youtu.be/4yoSocEwTEY

Some picture I used:
Carbon dioxide molecule: commons.wikimedia.org/wiki/File:Carbon_dioxide_3D_ball.png
Sulphur hexafluoride molecule: commons.wikimedia.org/wiki/File:Sulfur-hexafluoride-from-xtal-3D-balls.png

This question was originally asked by my mechanics teacher a while back. Credits to him.