Respuesta :

Step-by-step explanation:

Statements                                                  Reasons                                    

1 . ∠ABC and ∠CBD are a linear pair         Given

2. m∠CBD = m∠EFG                                   Given

3 . ∠ABC and ∠CBD are supplementary   Definition of linear pair

4. m∠ABC + m∠CBD = 180°                        Definition of supplementary

5. m∠ABC + m∠EFG = 180°                         Substitution property

6. ∠ABC and ∠CBD are supplementary    Definition of supplementary