Question

If 3 angle of quadrilateral are 75,90 and75. Then what will be fourth angle of quadrilateral?

Answer 1

With angle sum property of a quadrilateral:
angle1 + angle2 + angle3 + angle4 = 360°
hence
75°+90°+75°+angle4=360°
240°+angle4=360°
angle4=360°-240°
angle4 = 120°

Answer 2

Hello!!!

Here's the Answer :


We know that, sum of all interior angles of a Quadrilateral is 360° .


Let the fourth angle be x .

=> According to Question.

75 + 90 + 75 + x = 360

240 + x = 360

x = 360 - 240

x = 120


So, the fourth angle is 120° .


Hope It Helps!!!