Question

the three anglesof a quadrilateral are 80° 70°180° find the fourth angle ​

Answer 1

Step-by-step explanation:

Total angle=360

3 angles total=80+70+180=330

Remaining angle=360-330=30

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Answer 2

Answer:

we know,

sum of all angles of a quadrilateral = 360 degrees

let the fourth angle be x

now,

angle ( 1 + 2 + 3 +4 ) = 360

80 + 70 + 180 + angle 4 = 360

330 + angle 4 = 360

angle 4 = 360 - 330

. ' . angle 4 = 30 degrees

Step-by-step explanation:

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