Question

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

Answer 1

Answer:

100 degree is the fourth angle of the quadrila teral

Answer 2

Answer:

$let \: the \: fourth \: angle \: be \: = x \\ 60 + 80 + 120 + x = 360 \\ 140 + 120 + x = 360 \\ 260 + x = 360 \\ x = 360 - 260 \\ x = 100degree \\ angle \: 4 = 100degree$