Math Problem Statement

Find the value of x.

Solution

The image shows two triangles, with one inscribed inside the other. The triangles share an angle and have sides that are marked as proportional, suggesting the triangles are similar. We can use the property of similar triangles to solve for xx.

Step-by-step approach:

  1. Identify the corresponding sides:

    • For the large triangle:
      • One side is 12x812x - 8.
      • The corresponding base is 2x+42x + 4.
    • For the smaller triangle:
      • The corresponding side is 1616.
      • The corresponding base is 1717.
  2. Set up a proportion using the corresponding sides of the similar triangles: 12x816=2x+417\frac{12x - 8}{16} = \frac{2x + 4}{17}

  3. Cross-multiply to eliminate the fractions: (12x8)×17=16×(2x+4)(12x - 8) \times 17 = 16 \times (2x + 4) This simplifies to: 204x136=32x+64204x - 136 = 32x + 64

  4. Solve for xx: 204x32x=64+136204x - 32x = 64 + 136 172x=200172x = 200 x=200172=10086=5043x = \frac{200}{172} = \frac{100}{86} = \frac{50}{43}

So, the value of xx is 5043\frac{50}{43}.

Would you like a further breakdown of any steps or have additional questions?

Related Questions:

  1. How do you identify similar triangles in a diagram?
  2. What are the properties of proportionality in similar triangles?
  3. How does cross-multiplication work in proportions?
  4. What are some real-life applications of similar triangles?
  5. How can the simplification of fractions help in solving equations?

Tip: Always check for corresponding angles and sides when dealing with similar triangles.

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Math Problem Analysis

Mathematical Concepts

Similar Triangles
Proportions
Algebra

Formulas

Proportionality: (side1 of large triangle) / (side1 of small triangle) = (side2 of large triangle) / (side2 of small triangle)

Theorems

The Similarity Theorem
Cross-multiplication

Suitable Grade Level

Grades 9-11