Question

three angles of a quadrilateral are 70•,90• and 120• . find the measure of the fourth angle​

Answer 1

Answer:

80° is the fourth angle....

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Answer 2

Step-by-step explanation:

3 angles of quadrilateral=70,90,120

let fourth angle be y

we know that,

sum of all angles of quadrilateral=360

x+70+90+120=360

x+180=360

x=360-180

x=180

hence, fourth angle is 180 degree

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