A triangle having 3 congruent sides is an equilateral triangle
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SSS, SAS, ASA, AAS, RHS. SSA can prove congruence if the angle in question is obtuse (if it's 90 degrees, then it's exactly equivalent to RHS).
there are 4 types of congruence theorem-: ASA,SSS,RHS,SAS
It does not necessarily prove congruence but it does prove similarity. You can have a smaller or bigger triangle that has the same interior angles.
RHS congruency, or, right angle, hypotenuse and corresponding side.
right triangle