Convenable.
ETYM Latin congruens, p. pr. of congruere: cf. French congruent.
In geometry, having the same shape and size, as applied to two-dimensional or solid figures. With plane congruent figures, one figure will fit on top of the other exactly, though this may first require rotation and/or rotation of one of the figures.
Congruous; Geometry, in agreement or correspondence; exactly coincident.