Question

Find x and y in the following.

Please answer them correctly I trust you.

(Note :- Answer only the 2nd part rest I have figured out myself).​

Answer 1

mark the mid O

now in triangle DOC,

angle DOC= 100°(given)

angle ODC=OBA=50°(alternate)

so, angle DOC + ODC+ OCD=180°(sum of all angles of triangle)

100+50+x=180

150+x =180

x=180-150=30°

now angleDOC+DOA=180(Linear pair)

100+DOA=180

DOA=80°

so, angle DAO+ DOA + Y= 180(sum of all angles of triangle)

40 + 80+ y =180

120+y=180

y=180-120

y=60°