Directions: Use the image to help you answer the questions in the portfolio.
Part A
A map shows the layout of four city streets. The streets have the following properties:
• North Street, Center Street, and South Street are parallel to each other.
• Main Street intersects the other three streets. Answer the following questions:
1. What is the measure, in degrees, of ∠1? Show or explain how you got your answer.
2. What is the measure, in degrees, of ∠2 ? Show or explain how you got your answer.
3. What is the measure, in degrees, of ∠3? Show or explain how you got your answer.
Part B
Suppose that two additional streets, Elm Street and Oak Street, are added to the map. The streets have the following properties:
• Elm Street is perpendicular to Main Street.
• Elm Street is also perpendicular to Oak Street.
What is the relationship of the lines that represent Main Street and Oak Street? Explain your reasoning.
