Math Problem Statement

Given m || n, find the value of x.

Solution

In this image, two parallel lines mnm \parallel n are cut by a transversal, creating two corresponding angles:

  1. (9x9)(9x - 9)^\circ
  2. (x1)(x - 1)^\circ

Since the lines mnm \parallel n, and these angles are corresponding angles, they are equal. Thus, we can set up the following equation:

9x9=x19x - 9 = x - 1

Solving for xx:

  1. Subtract xx from both sides: 9xx9=19x - x - 9 = -1 8x9=18x - 9 = -1

  2. Add 9 to both sides: 8x=88x = 8

  3. Divide by 8: x=1x = 1

Thus, the value of xx is 1.

Would you like further details or explanations on any part of the solution? Here are some related questions:

  1. What are corresponding angles in geometry?
  2. How do we identify alternate interior angles when lines are parallel?
  3. What are some other angle relationships when parallel lines are cut by a transversal?
  4. Could this approach be used for supplementary angles as well?
  5. How would the solution change if the lines weren't parallel?

Tip: When solving geometric problems involving parallel lines, identifying angle relationships like corresponding, alternate interior, and exterior angles can simplify the problem greatly.

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Math Problem Analysis

Mathematical Concepts

Geometry
Angles
Parallel Lines

Formulas

Corresponding angles are equal when two parallel lines are cut by a transversal.

Theorems

Corresponding Angle Postulate

Suitable Grade Level

Grades 8-10