Question

Q.6 If three angles of a quadrilateral are 100°,75°,105° then measure of 4 angl is
(i) 100°
(ii) 90
(iii) 80°
(iv) 110°​

Answer 1

Check the picture for answer hope it helps u

Answer 2

We know that sum of all angles of quadrilateral measure 360 degrees

So,

Using

Angle sum property of triangle

100 +75+105+x=360

X=80

Hence,

(iii) 80 degrees

Is correct