Math Problem Statement

Two parallel lines are cut by a transversal. Suppose m∠8 = 97°. Find m∠2 and m∠3.

Solution

We are given that two parallel lines are cut by a transversal, and we know that m8=97m\angle 8 = 97^\circ. Our task is to find m2m\angle 2 and m3m\angle 3.

Step-by-Step Solution:

  1. Relationship between 8\angle 8 and 2\angle 2:

    • Angles 2\angle 2 and 8\angle 8 are corresponding angles because they are on the same side of the transversal and the same side of the parallel lines.
    • For parallel lines, corresponding angles are congruent, so: m2=m8=97m\angle 2 = m\angle 8 = 97^\circ
  2. Relationship between 8\angle 8 and 3\angle 3:

    • Angles 8\angle 8 and 3\angle 3 are consecutive interior angles, or sometimes called same-side interior angles.
    • Consecutive interior angles are supplementary, meaning their measures add up to 180180^\circ. So: m8+m3=180m\angle 8 + m\angle 3 = 180^\circ Since m8=97m\angle 8 = 97^\circ, we have: 97+m3=18097^\circ + m\angle 3 = 180^\circ Solving for m3m\angle 3: m3=18097=83m\angle 3 = 180^\circ - 97^\circ = 83^\circ

Final Answers:

  • m2=97m\angle 2 = 97^\circ
  • m3=83m\angle 3 = 83^\circ

Would you like further details or clarifications?

Here are 5 related questions you can explore:

  1. What are alternate interior angles, and how do they relate to parallel lines?
  2. If m1=97m\angle 1 = 97^\circ, what is m4m\angle 4?
  3. How can you prove that two lines are parallel using angle relationships?
  4. What are vertical angles, and how do they relate to this diagram?
  5. How do transversal angles behave when the lines are not parallel?

Tip: Always remember, corresponding angles are congruent when two parallel lines are cut by a transversal!

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Math Problem Analysis

Mathematical Concepts

Geometry
Angles
Parallel Lines
Transversals

Formulas

Supplementary angles: m∠x + m∠y = 180°
Corresponding angles: m∠A = m∠B when parallel lines are cut by a transversal

Theorems

Corresponding Angles Postulate
Consecutive Interior Angles Theorem

Suitable Grade Level

Grades 7-9