1. CYWIRO eich gwaith
2. Ymdrechu i DDEALL eich camgymeriadau (pwysig!)
Cliciwch yma i gael esboniad cam-wrth-gam o sut i greu ongl 60 gradd
Cliciwch yma i weld sut i greu llinell berbendiciwlar o bwynt: https://www.mathopenref.com/constperpextpoint.html
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Sut i greu llinell berbendiciwlar drwy ganol llinell: https://www.bbc.co.uk/bitesize/articles/zyfb2nb















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