you can assume that the angles are congruent, but not the sides.
No, they are similar. They may be congruent, but they need not be.
angles
Correct. Congruency means that two triangles have three pairs of congruent angles and corresponding sides of the same lengths. A pair of triangles with three pairs of congruent angles but sides of different lengths are similar, not congruent.
Yes, similar triangles are congruent because in order to be congruent they must first be equal. Which in turn is the definition of a similar triangle. A triangle equal in angle measurements and/or side lengths. So, yes.
The triangles are similar, but not necessarily congruent.
False. The statement should be: If the corresponding side lengths of two triangles are congruent, and the triangles are similar, then the corresponding angles are also congruent.
Yes.
No, they are similar. They may be congruent, but they need not be.
angles
proportional
Proportional.
They are congruent triangles.
When all of their corresponding angles are congruent (in any triangle, in fact) then the triangles are similar. Similarity postulate AAA. (angle-angle-angle)
angles are congruent. That is sufficient to force the corresponding sides to be proportional - which is the other definition of similarity.
Triangles are congruent if they have the same size and shape, meaning their corresponding sides and angles are equal.
All the corresponding sides in congruent triangles are equal All the corresponding angles in congruent triangles are equal
Two triangles are congruent if their corresponding sides are equal in length, and their corresponding angles are equal in measure.