Question

in a quadrilateral ABCD angle A= 120degree, angle B= 60 degree and Angle C=90 degree find D​

Answer 1

ABCD is quadrilateral.

Angle A+AngleB+AngleC+AngleD=360

(Sum of angles of quadrilateral)

=>120+60+90+AngleD=360

=>270+AngleD=360

=>Angle D=360-270

=>angle D=90degree

Answer 2

Answer:

the answer is 90 of this question