Question

three angles of a quadrilateral are 75* ,90* and 75*. The fourth angle is

(a) 90*

(b) 95*

(c) 105*

(d) 120*

Answer 1

Given, '
three angles of a quadrilateral are 75 ,90 and 75
We know that sum of all the angles of a quadrilateral is = 360 so
4th angle = 360 - (sum of three angle)
=360- ( 75+90+75)
= 360- 240
=120 degree