Problem 5.1: Is triangle ABC similar to triangle DEF? If so, by which method can you prove their congruence? [Solution]

Problem 5.2: Is triangle ABC similar to triangle DEF? If so, by which method can you prove their congruence? [Solution]

Problem 5.3: Is triangle ABC similar to triangle DEF? If so, by which method can you prove their congruence? [Solution]

Problem 5.4: Is triangle ABC similar to triangle DEF? If so, by which method can you prove their congruence? [Solution]

Problem 5.5: Is triangle ABC similar to triangle DEF? If so, by which method can you prove their congruence? [Solution]