Question

In a quadrilateral ABCD, the measure of the three angles A, B and C is 110°, 70° and 80°, respectively. Find the measure of the fourth angle
1)40°
2)100°
3)80°
4)120

Answer 1

Step-by-step explanation:

We know that the sum of all angles of a quadrilateral is equal to 360

Then....

=> A+B+C+D=360

=> 110+70+80+D=360

=> 260+D=360

=> D =360-260

=> D =100

HOPE THIS WILL HELP U

Answer :- 100

Answer 2

Answer:

100

Step-by-step explanation:

In a quadrilateral, sum of angles= 360°

A+B+C+D=360

or D= 360-(A+B+C)

or D= 360- 260=100