SSS (side, side, side) SSS stands for “side, side, side” and means that we have two triangles with all three sides equal. If three sides of one triangle are equal to three sides of another triangle, the triangles are congruent.Click to see full answer. Also asked, is SSA a unique triangle?You may be tempted to think that given two sides and a non-included angle is enough to prove congruence. But there are two triangles possible that have the same values, so SSA is not sufficient to prove congruence. And yet the triangles are clearly not congruent – they have a different shape and size.Also Know, which set of measurements will form a unique triangle? correspondence; three side lengths of a triangle determine a unique triangle. equal under some correspondence; two sides and an included angle of a triangle determine a unique triangle. In this way, what does a unique triangle mean? The two angles and any side condition determines a unique triangle. Since the condition has two different arrangements, we separate it into two conditions: the two angles and included side condition and the two angles and the side opposite a given angle condition.Is AAA a postulate?In Euclidean geometry, the AA postulate states that two triangles are similar if they have two corresponding angles congruent. (This is sometimes referred to as the AAA Postulate—which is true in all respects, but two angles are entirely sufficient.) The postulate can be better understood by working in reverse order.