Question

if three angles of a quadrilateral are 70 degree 100 degree and 120 degree find the fourth angle.​

Answer 1

.

Step-by-step explanation:

Let fourth angle=x

x+70+100+120=360°

x=360-290

x=70°

Answer 2

Answer:

70 degrees

Step-by-step explanation

The total angle of a quadrilateral is 360 degrees

let the 4th angle be x

70 + 100 + 120 + x = 360

x = 360 - 290

Therefore , x = 70 degrees