Question

Three angles of a quadrilateral are equal and the measure of the fourth angle is 120 degrees. Find the measure of each of the equal angles

Answer 1

Hey


♦ A quadrilateral has 4 sides and hence, total sum of angles = ( 2 x 4 - 4 ) 90°

→ Let A be the Angle

=> ( A + A + A + 120° ) = ( 360° )

=> ( 3A ) = 240°

=> A = 80°

Hence, each of the equal Angles measure 80° 

Answer 2

let the angle be x then 3x+120=360
x=240/3=80degrees