Question

Find the angle of a quadrilateral are in



a.p. with common difference 20degree find its angles

Answer 1

Let the angles be x,x-20,x-40,x-60
Sum of the angles of quadrilateral=360°
x+x-20+x-40+x-60=360°
4x-120=360
4x=480
x=120°
The angles are 120°,100°,80°,60°