yr ystafell gefn
Dyddiadur
| Gorffennaf 2010 | ||||||
| S | Ll | M | M | I | G | S |
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Gorffennaf ---- July
11
Sul
Sunday
Sunday
Yr unfed ar ddeg o Orffennaf
The eleventh of July
The eleventh of July
Heddiw ym 1588 : Bu farw Robert Recorde y mathemategydd o Ddinbych y Pysgod. Fe oedd y cyntaf erioed i ddefnyddio’r symbolau ‘+’ a ‘=’ yn ei waith.
Today in 1588 : Robert Recorde the mathematician from Tenby died. He was the first ever to use the symbols ‘+’ and ‘=’ in his work.