Question

can anyone do it for me please ​

Answer 1

Answer:

angle AOB=180-50

=130

let angle OBA=angleOAB=x

then sum of all angle of a traingle is 180

angle OBA+angle OAB+angle AOB=180

x+x+130=180

2x+130=180

2x=180-130

x=50/2

x=25

then angle OBA=angle OAB=25

angle Boc=angleBoD+angle Doc

=50+50

=100

angle BAC=angle BAO+angleOAC

=25+25

=50