Question

Three angles of a quadrilateral are 75º, 90º and 75º. The fourth angle is_​

Answer 1

Answer:

120 degree

Step-by-step explanation:

Sum of angles of a quadrilateral is 360

o

∴ fourth angle be,

⇒ 360−(75+90+75)=120

∘

Answer 2

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We know that,

Sum of all angles in a Quadrilateral = 360°

So the 4th angle will be 360° - (75° + 90° + 75°)

= 360° - 240°

= 120°