Question

need answers for this ​

Answer 1

Answer:

look at the quadrilateral BACO

angle OBA is 90-3x

BAC is 90-2x

ACO is x

BOC is 180 - y

now these angle should add up to 360, then putting y=4x

LHS=RHS

hence proved

hint: for isosceles triangle are the angles attached to equal sided arms.are equal.