GeometryProblem 506 Sir SagarJanuary 18, 2015January 18, 20150 Triangle ABC and DEF are congruent. Find x. Solution:- In a congruent triangle AB = DE. x + 6 = 3x – 5 3x – x = 6 + 5 2x = 11 x = 11/2 x = 5.5