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 Solution Find parallelogram A(1,5),B(1,4),C(-1,3),D(-1,4)Solution:Your problem -> parallelogram A(1,5),B(1,4),C(-1,3),D(-1,4)Here A(1,5), B(1,4), C(-1,3), D(-1,4) are the given pointsAB^2 = (1-1)^2 + (4-5)^2 = (0)^2 + (-1)^2 = 0 + 1 = 1CD^2 = (-1+1)^2 + (4-3)^2 = (0)^2 + (1)^2 = 0 + 1 = 1BC^2 = (-1-1)^2 + (3-4)^2 = (-2)^2 + (-1)^2 = 4 + 1 = 5AD^2 = (-1-1)^2 + (4-5)^2 = (-2)^2 + (-1)^2 = 4 + 1 = 5:. AB^2=CD^2 and BC^2=AD^2:. AB=CD and BC=ADA quadrilateral, in which opposites sides are equal, is a parallelogram:. ABCD is a parallelogram Solution provided by AtoZmath.com Any wrong solution, solution improvement, feedback then Submit Here Want to know about AtoZmath.com and me