Question

Three angles of a quadrilateral are 70° , 30° , 40°. Its fourth angle is​

Answer 1

Answer:

fourth angle is 120°

because the sum of all the angles of a quadrilateral is 360°

Step-by-step explanation:

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Answer 2

Answer:

220

Step-by-step explanation:

sum of all angles of quad is 360

now,

70+30+40 equals 140

the 4th angle is 360-140=220