asthakarn26 asthakarn26

19-09-2021
Mathematics

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Аноним Аноним

19-09-2021

Answer:

Answer: (a). 290°

[tex]{ \tt{a + 40 \degree + 30\degree = 360\degree}} \\ \\ { \tt{a + 70\degree = 360\degree}} \\ \\ { \tt{a = 360\degree - 70\degree }} \\ \\ { \boxed{ \tt{ \: \: a = 290\degree}}}[/tex]

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