Question

Vẽ góc mOn = 110 độ. Vẽ tia Ot sao cho mOt = 20 độ. Góc nOt bằng bao nhiêu?

Answer 1

\(\widehat{nOt}=\widehat{mOn}-\widehat{mOt}=110^o-20^o=90^o\)

Answer 2

có

\(\widehat{mOt}+\widehat{nOt}=\widehat{mOn}\)

\(=>20^o+\widehat{nOt}=110^o\\ =>\widehat{nOt}=110^o-20^o=90^o\)

Answer 3

Ta có:

\(\widehat{nOt}=\widehat{mOn}-\widehat{mOt}=110^o-20^o=90^o\)

Vậy: \(\widehat{nOt}=90^o\)