Question

Please tell the answer

Answer 1

Answer:

a

Step-by-step explanation:

lllllllllllllllkhgjfydsefadfghjk

Answer 2

Answer:

angle A+ angle B+ angle C+ angle D=360⁰

angle A+angle B+30⁰+70⁰=360⁰

angle A+angle B=260⁰

multiplying both sides by 1/2

1/2(angle A+ angle B)=130⁰

angle OAB+angle OBA=130⁰.

In triangle OAB,

angle OAB+angle OBA+angle AOB=180⁰

130⁰+angle AOB=180⁰

angle AOB=50⁰