Main content
Where did the 'Equals' Sign Come From?
A look at Welsh influences in the history of mathematics - Robert Recorde, the first mathematician to use the equals sign and the plus and minus signs in English in 1577 and William Jones the first to use the pi symbol (蟺) in 1707.
Duration:
This clip is from
More clips from Firsts
-
![]()
Who made the first ever flight in an aeroplane?
Duration: 02:36
-
![]()
Babs and the Land Speed Record
Duration: 01:35
-
![]()
Babs
Duration: 02:45
-
![]()
Trevithick's Steam Engine
Duration: 03:42
More clips from Wales and the History of the World
-
![]()
Who was Hedd Wyn?—Series 1, Conflict
Duration: 02:31
-
![]()
Who made the first ever flight in an aeroplane?—Series 1, Firsts
Duration: 02:36
-
![]()
Merthyr Rising—Series 1, Ideas
Duration: 02:04
-
![]()
Babs and the Land Speed Record—Series 1, Firsts
Duration: 01:35
