Question

if two sides in one triangle are congruent to two sides in another triangle, then the two triangles are congruent. true or false ?

Answer 1

False.
Two triangles are congruent if two sides and angle between them in one triangle are congruent to two sides and angle between them in another triangle. If we know nothing about triangle angles, triangles will be congruent in case if three sides of one triangle will be congruent to tree sides of another triangle.