In the given figure, PQRS is a cyclic quadrilateral in a circle with centre O. If ∠PSR=130∘. Find ∠QPR.
ABCD is a cyclic quadrilateral in a circle with centre O. If angle ADC = 130o; then angle BAC is
ABCD is a cyclic quadrilateral, in which ∠DBC =80∘ and ∠BAC = 40∘ . Find ∠BCD.