n. The quality of agreeing; being suitable and appropriate
n. The state of being congruent
the GNU version of the Collaborative International Dictionary of English
n. Congruence.
The Century Dictionary and Cyclopedia
n. Same as congruence, 1.
n. In mathematics, a continuous and doubly infinite system of infinite straight lines; the system of all the forms of any given kind in space which fulfil two conditions, as all the double tangent lines of a surface.
Word Usage
"Therefore, make sure that you cover topics such as congruency and similarity of triangles."