Question

congruence of triangles

Answer 1

two triangles are called congruent triangles if and only if they have exactly the same shape and same size.

there are five axioms of congruency in total:

S.S.S[Side side side] axiom of congruency.
S.A.S [side angle side] axiom of congruency.
A.S.A [angle side angle] axiom of congruency.
A.A.S [angle angle side] axiom of congruency.
R.H.S [right angle hypotenuse side] axiom of congruency.