Question

the three angles of quadrilateral are 60° 80° and 120° find the fourth angle​

Answer 1

Answer:

Let the fourth angle be x

Now,

60°+80°+120°+x=360(Angle sum property of a quadrilateral)

x+260°=360°

x=360-260

x=100°

Answer 2

Answer:

60+80+120+x=360

260+x=360

x=360-260

x=100

fourth angle is 100

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