Question

three angle of a quadrilateral are 60°,80°,120°​

Answer 1

Answer:

sum of angles of quadrilateral is 360

then

other angle is 360-(60+120+80)

it is 360-260

=100

ok

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Answer 2

Answer:

Sum of angles of quadrilateral is = 360

.......

...........Angles are 60° , 80° ,120°

..so,

Sum of angles 60+80+120= 260

360-260

=100..........@@