Question

find the value of x if the angle OAB is 50

Answer 1

according to the diagram provided it seems that AO is parallel to BD .

so then

angle OAB and angle ABD are alternate angle

angle OAB = 50° = angle ABD

angle CBD = 90°

here,AB is the diagonal drawn from vertex A to vertex B which bisecting the right angle at B.

angle CBA + angle ABD = angle CBD

x + 50° = 90°

x = 40°

Answer: x = 40°