In the figure, if AB = CD and ∠ABO = 35∘. What is the value of ∠DCO in degrees?
OB = OC (Radii of the same circle)
OA = OD (Radii of the same circle)
AB = CD (Given)
△AOB ≅ △ DOC (By SSS congruence condition)
So, ∠ABO = ∠DCO = 35∘(Corresponding parts of congruent triangles)