If the measurements of a quadrilateral ABCD are given as AB = BC = CD = DA = 4 cm, we can conclude that ABCD is a square.
False
With the given measurements as, AB = BC = CD = DA = 4 cm, the given figure can be either a square or it can be bent to form another quadrilateral, a Rhombus. So the given 4 measurements of the 4 sides are not sufficient to determine a unique quadrilateral.