Question

Please guys help itzz urgent I will mark you as brainliest..Q7and 8..plzz..

Answer 1

q7
Join OA
oa = ob
so angles are equal
similarly oc=ob
do add them you will get 100
q8: 30(sum of opp. angles are supplementary

Answer 2

q. 7 20+30+bac=180 gives 50+bac=180 bac=130

number 8 is wrong it is contradictory to a law