ABCD is a cyclic quadrilateral whose diagonals intersect at a point E. If ∠DBC=70∘,∠BAC is 30∘, find ∠BCD . Further, if AB = BC, find ∠ECD.

ABCD is a cyclic quadrilateral whose diagonals intersect at a point E.

1.	ABCD is a cyclic quadrilateral whose diagonals intersect at a point E. If ∠DBC=70∘,∠BAC is 30∘, find ∠BCD . Further, if AB = BC, find ∠ECD.
Answer» ABCD is a cyclic quadrilateral whose diagonals intersect at a point E. If $∠ D B C = 70^{\circ}, ∠ B A C is 30^{\circ}$ , find $∠ B C D$ . Further, if AB = BC, find $∠ E C D$ .