Question

quadrilateral ABCD angle equal to 120 degree angle B equal to 60 degree and Angle c equal to 90 degree find angle d​

Answer 1

Step-by-step explanation:

Sum of angles = 360°

Other angles are = 120°, 60°, 90°

Let angle D be x.

120°+ 60° + 90° + x = 360°

270° + x = 360°

x = 360° - 270°

x = 90°

TO CHECK:

120° + 60° + 90° + 90°= 360°

Answer:

90°