Question

three angle of a quadrilateral are 80 , 100 , 60 . find the fourth angle ​

Answer 1

Answer:

80+100+60+x=360

x+240=360

x=360-240

x=20

Answer 2

Answer:

120°

Step-by-step explanation:

Sum of all angles of a quadrilateral is 360°

If measure of 3 angles is 80°, 100° and 60°

Then the measure of fourth angle suppose as x

Therefore,

80+100+60+x=360

240+x=360

x=360-240

x=120°

Therefore, measure of fourth angle is 120°