Question

Ole!
. Three angles of a quadrilateral are equal to 100°, 60° and 80 respectively.
Find its fourth angle,
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Answer 1

Answer:

the anotherangle is 120

Answer 2

Answer:

By ASP  Sum of angles in a quadrilateral is 360

let the 4th angle be x

x+100+60+80=360

x+240=360

x=120

so the fourth angle is 120 degrees