Question

(d) In the given figure SRDC, BC | QR, the measure of ZBCD
of quadrilateral ABCD is​

Answer 1

Answer:

∠DBC = ∠CAD = 60° [angle is same segment]

Also, ∠BAD = ∠BAC + ∠CAD = 30° + 60° = 90°

Now, ∠BAD + ∠BCD = 180° [∵ ABCD is a cyclic quadrilateral]

⇒ 90° + ∠BCD = 180°

⇒ ∠BCD = 90°