Editing Metric system (section)

===Length===
The length of the [[equator]] is close to {{val|40000000|u=metres}} (more precisely {{val|40075014.2|u=metres}}).<ref>{{cite web |last1=Science |first1=Tim Sharp 2017-09-15T15:47:00Z |last2=Astronomy |title=How Big Is Earth? |url=https://www.space.com/17638-how-big-is-earth.html |access-date=22 October 2019 |website=Space.com}}</ref> In fact, the dimensions of our planet were used by the French Academy in the original definition of the metre.<ref>{{cite web |title=Metre {{!}} measurement |url=https://www.britannica.com/science/metre-measurement |access-date=22 October 2019 |website=Encyclopedia Britannica}}</ref> A dining tabletop is typically about 0.75 metres high.<ref>{{cite web |title=Standard Table Sizes |url=https://www.bassettfurniture.com/blog/standard-table-sizes.aspx |access-date=22 October 2019 |website=Bassett Furniture}}</ref> A very tall human is about 2 metres tall.<ref>{{cite web |date=9 December 2018 |title=The Average Height of NBA Players – From Point Guards to Centers |url=https://www.thehoopsgeek.com/average-nba-height/ |access-date=22 October 2019 |website=The Hoops Geek}}</ref>