Question

the angles of a quadrilateral are 75°, 90°, 75°. find the fourth angle​

Answer 1

Sum of all angles of a quadrilateral= 360°

Let the fourth angle be x

= 75 + 90 + 75 + x = 360°

= 240 + x = 360°

x = 120°

Hence, the fourth angle is of measure 120°.

Answer 2

Hello friends

The sum of the quadrilateral = 360

Fourth angle = 360 - ( 75 +90 + 75 )

360 - 240

120

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