Question

how to find the value of this unknown angle​

Answer 1

Answer:

$x$ = 80

Step-by-step explanation:

The sum of all angles in a quadrilateral is 360 so thus

120 + 100 + 60 + $x$ = 360

280 + $x$ = 360

$x$ = 80

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Answer 2

Answer:

x=80°

Step-by-step explanation:

120+60+100+x=360°. ( angle sum property of a quadrilateral)

So,. 120+60+100+x=360

280+x=360

x=360-280

x=80°...

HOPE THIS HELPS YOU.