Question

The measure of three angles of a quadrilateral are 100* , 80* , 120* . Find the measure of the fourth angle .

Answer 1

Answer:

60°

Explanation:

let the last angle be x

100+80+120+x=360

300+x=360

x=360-300

x=60°

Answer 2

Explanation:

the measure of all angles of a quadrilateral is 360°

so let the fourth angle be a

then,

100°+80°+120°+a° =360°

300° + a° = 360°

a° = 60°

so the measure of fourth angle is 60°

mark as brainlist if you are satisfied with the answer