Given the adjacent angles of a parallelogram are in ratio 2:3 Let the two adjacent angles of parallelogrambe 2 x and 3 x adjacent angles of parallelogram is given as 1800 2x+3x =1800 5x =1800 x =1800/ 5 x= 360 angles of parallelogramare 2 x and 3 x 2*(360) and 3*(360) =720and 1080