Math Problem Statement

Find the value of x given two corresponding angles (2x - 8)° and (9x - 10)° formed by a transversal and parallel lines.

Solution

This diagram shows two intersecting lines crossed by a transversal, creating pairs of corresponding and alternate interior angles. The angles are given as algebraic expressions: one angle is (2x8)(2x - 8)^\circ and the other is (9x10)(9x - 10)^\circ. These angles appear to be corresponding angles because of the parallel lines and the transversal.

Since corresponding angles are equal, we can set up the equation:

2x8=9x102x - 8 = 9x - 10

Solving for xx:

  1. Subtract 2x2x from both sides: 8=7x10-8 = 7x - 10
  2. Add 1010 to both sides: 2=7x2 = 7x
  3. Divide both sides by 77: x=27x = \frac{2}{7}

Thus, x=27x = \frac{2}{7}.

Would you like to verify this solution by substituting the value of xx back into the angles? Or do you have any additional questions?

Here are some related questions for further practice:

  1. What are alternate interior angles, and how do they relate to parallel lines?
  2. If x=27x = \frac{2}{7}, what is the measure of each angle in the diagram?
  3. How would you solve this if the angles were supplementary instead of equal?
  4. Can two angles corresponding to each other ever be unequal?
  5. What happens if the lines are not parallel?

Tip: Always check the type of angles involved (e.g., corresponding, alternate interior, or supplementary) before setting up an equation.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Geometry
Angles formed by transversals

Formulas

Equation of corresponding angles: 2x - 8 = 9x - 10

Theorems

Corresponding Angles Postulate
Properties of parallel lines cut by a transversal

Suitable Grade Level

Grades 8-10