Let's go through the questions from the image and solve them one by one.

Question 4:

• Generalize: For any pair of angles formed by a transversal intersecting parallel lines, there are two possible relationships:
  1. Congruent (equal in measure) – Corresponding angles, Alternate interior angles, Alternate exterior angles.
  2. Supplementary (sum to 180°) – Consecutive interior angles (also called same-side interior angles).

Use the diagram for Exercises 5–10:

We will solve each question by referring to the diagram provided.

Question 5:

• Angles ∠3 and ∠5:
  • These are corresponding angles since they are on the same side of the transversal and in matching positions.
  • By the Corresponding Angles Postulate, ∠3 ≅ ∠5 (they are congruent).

Question 6:

• Angles ∠2 and ∠6:
  • These are also corresponding angles.
  • By the Corresponding Angles Postulate, ∠2 ≅ ∠6 (they are congruent).

Question 7:

• If m∠1 = 71°, find the measure of each angle:
  • From the diagram, ∠1 is corresponding to ∠5, so m∠5 = 71°.
  • Additionally, ∠1 and ∠4 are vertically opposite angles, so m∠4 = 71°.
  • Using the same reasoning, m∠5 = m∠8, and m∠4 = m∠6.

Question 8:

• m∠7:
  • From the diagram, ∠7 and ∠6 are consecutive interior angles, so they are supplementary.
  • m∠7 + m∠6 = 180°, and since m∠6 = 71°: $m∠7 = 180° - 71° = 109°$

Question 9:

• If m∠5 = 2x + 3 and m∠3 = 3x + 12, find the measure of each angle:
  • ∠5 and ∠3 are corresponding angles, so m∠5 = m∠3: $2x + 3 = 3x + 12$ Solving for $x$: $3 = x + 12 \implies x = -9$ Now, substitute $x = -9$ back into the expressions for ∠5 and ∠3: $m∠5 = 2(-9) + 3 = -18 + 3 = -15° \quad (\text{Note: This seems impossible; we may need to check the problem's wording}).$

Question 10:

• If Elm St. and Spruce St. are parallel, what is m∠1?
  • From the image of the street diagram, if Elm St. and Spruce St. are parallel and the lines are intersected by a transversal, the angle marked as ∠1 is likely 112° (corresponding angle from the parallel lines and transversal).

Do you have any further questions, or would you like more details on any of these problems? Here are five related questions to explore the topic further:

1. What are alternate interior angles, and how do they relate to parallel lines?
2. How can we prove that corresponding angles are congruent?
3. What happens to the angle relationships if the lines are not parallel?
4. Can vertical angles ever be supplementary? If so, under what conditions?
5. How can we use algebra to solve for unknown angles when given expressions for angle measures?

Tip: When working with parallel lines cut by a transversal, remember to identify corresponding, alternate interior, and same-side interior angles to quickly determine their relationships.