Question

The measure of three angles of a quadrilateral is 30˚, 70˚ and 100˚. Find out

the measurement of fourth angle​

Answer 1

Answer:

Let Quadrilateral Be ABCD

let angle a=30

let angle b=70

let angle c=100

let angle d=d

angle a+angle b+angle c+angle d =360°{Sum of measure of angles of quadrilateral}

30+70+100+angle d=360

200+angle d=360

angle d=360-200

angle d=160

Therefore fourth angle is 160°