They are said to be similar but not congruent triangles.
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Such triangles are similar.
Sides
No- triangles with all angles respectively equal need not be congruent. For example, all equilateral triangles have 3 angles of 60 degrees each but the the sides could be any length. However the sides of such triangles are proportional - such triangles are called similar. They look alike except for their scale.
aa. If the angles are equal and the triangles are right triangles, then all three angles are equal, but the sides can grow or shrink, as long as they remain proportional.
Triangles can't have two sides, but a triangle with three congruent sides is a equilateral or three congruent angles in a triangle is equilangular.