<Dd> <Dl> <Dd> If ∠ BAC is equal in measure to ∠ B ′ A ′ C ′, and ∠ ABC is equal in measure to ∠ A ′ B ′ C ′, then this implies that ∠ ACB is equal in measure to ∠ A ′ C ′ B ′ and the triangles are similar . </Dd> </Dl> </Dd> <Dl> <Dd> If ∠ BAC is equal in measure to ∠ B ′ A ′ C ′, and ∠ ABC is equal in measure to ∠ A ′ B ′ C ′, then this implies that ∠ ACB is equal in measure to ∠ A ′ C ′ B ′ and the triangles are similar . </Dd> </Dl> <Dd> If ∠ BAC is equal in measure to ∠ B ′ A ′ C ′, and ∠ ABC is equal in measure to ∠ A ′ B ′ C ′, then this implies that ∠ ACB is equal in measure to ∠ A ′ C ′ B ′ and the triangles are similar . </Dd> <Ul> <Li> All the corresponding sides have lengths in the same ratio: </Li> </Ul>

What is the definition of similarity in math