Answer
1- $140^o$
2- $40^o$
3- $40^o$
4- $140^o$
5- $83^o$
6- $97^o$
7- $97^o$
8- $83^o$
Work Step by Step
1- $140^o$ supplementary to 3
2- $40^o$ vertical angle with 3
3- $40^o$ given
4- $140^o$ supplementary to 3
5- $83^o$ supplementary to 7
6- $97^o$ vertical angle with 7
7- $97^o$ given
8- $83^o$ supplementary to 7
