Question

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Answer 1

Answer:

Fourth angle=120°

Step-by-step explanation:

Let the fourth angle be x.

Angle sum property

75°+90°+75°+x=360°

240°+x=360°

x=360°-240°

x=120°

Therefore, the fourth angle is 120°.

Answer 2

Answer:

1st angle 75

2nd angle 90

3rd angle 75

sum of all side as 360

so 75+90+75=240

360-240=120

120° is answer