Q. 14.8( 22 Votes )

Three angles of a quadrilateral are 75°, 90° and 75°. The fourth angle is
A. 90°

B. 95°

C. 105°

D. 120°

Answer :

Given: 3 angles of quadrilateral - 75°, 90° and 75°

Let the fourth angle be x.


We know that,


Sum of all angles of a quadrilateral = 360°


75° + 90° + 75° + x = 360°


240° + x = 360°


x = 360° – 240°


x = 120°


Hence, the fourth angle is 120°.

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