Diagonal |AC| = (2x + 1)cmIn the diagram,area of ∆ABCis 1102 = 12 x |AC| x |HB|55 = 12 x (2x + 1) x 1055 = (2x + 1)555 = 10x + 555 - 5 = 10x50 = 10xx = 5010= 5.0