Question

Q8) Find x and angleDOA in the adjoining figure​

Answer 1

Answer:

2x+55+x+3x+65=180

(linear angles)

6x+120 =180

6x=60

x=10

Now angle DOA=2x +55

=2*10+55

=20+55

=75

Answer 2

Answer:

AOD+DOC+COB=180. (linear pair)

2x+55+3x+65+x=180

2x+3x+55+65=180

5x=60

x=12