Question

ABCD is a cyclic quadrilateral. If ZBCD = 1000 and ZABD = 30°, then ZADB is​

Answer 1

Answer:

In quadrilateral ABCD, ∠DCB + ∠BAD = 180° (Opposite angles of Cyclic quadrilateral) 100° + ∠BAD = 180° ∠BAD = 80° In Δ BAD: By angle sum property: ∠ADB + ∠DAB + ∠ABD = 180° ∠ADB + 80° + 70° = 180° ∠ADB =30°

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