In a cyclic quadrilateral ABCD, if angle B is 120°, what is the measure of angle D?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 60°.
In cyclic quadrilateral, sum of opposite angles is equal to 180°.
In given quadrilateral, Angle A + Angle C = 180°
Similarily angle B + angle D = 180°
⇒ 120° + angle D = 180°
⇒ Angle D = 180° - 120°
⇒ Angle D = 60°