Step-by-step explanation:
When two triangles are congruent, their corresponding sides and angles are congruent. Since, the sides of the triangles are in relation, AB = 2 × A'B' and side BC = 2 × B'C' i.e. 4 = 2 × 2 and 9 = 2 × 4.5. Therefore, the ratio of the corresponding sides are given by 4 : 2 and 9: 4.5 i.e. 2 : 1.
