The measures of three angles of a quadrilateral are given as 90°. 96° and 88° The measure of its fourth angle is _________.

Correct option is B

​Given:
Angles of a quadrilateral: $$90^\circ, 96^\circ, 88^\circ$$​, and the fourth angle x.

Formula Used:
Sum of angles of a quadrilateral = 360^∘

Solution:

90 + 96 + 88 + x = 360

x = 360 - (90 + 96 + 88) = 360 - 274 = $$86^\circ$$​