### Home > GC > Chapter 7 > Lesson 7.3.1 > Problem 7-105

7-105.

Carolina compared her proof to that of Penn in problem 7-96. Like him, she wanted to prove that if

*a*=

*d*. Unfortunately, her statements were in a different order.

**Examine**her proof below and help her decide if her statements are in a logical order in order to prove that

*a*=

*d*. Homework Help ✎

Statements | Reasons |
---|---|

1. | Given |

2. | If lines are parallel, alternate interior angles are equal. |

3. | Substitution |

4. | If lines are parallel, corresponding angles are equal. |

5. | Vertical angles are equal. |

6. | Substitution |

Are all her statements in the proper order? Do the conclusions flow in a proper order?