Math Problem Statement

Find x and y for two similar triangles, where the smaller triangle has sides of lengths 2, 4, and 5, and the larger triangle has sides of lengths x, y, and 12.

Solution

In this image, we are given two triangles that appear to be similar, and the goal is to find the values of xx and yy. Since the triangles are similar, the sides of the triangles will be proportional to each other.

Step 1: Set up the proportion

The smaller triangle has sides labeled 2, 4, and 5, while the larger triangle has sides labeled xx, yy, and 12. To find xx and yy, we will use the fact that corresponding sides are proportional.

Let's match the corresponding sides:

  • The side with length 2 corresponds to the side with length xx,
  • The side with length 5 corresponds to the side with length 12,
  • The side with length 4 corresponds to the side with length yy.

So, we can set up the following proportions: x2=125\frac{x}{2} = \frac{12}{5} y4=125\frac{y}{4} = \frac{12}{5}

Step 2: Solve for xx

To solve for xx, multiply both sides of the first proportion by 2: x=2×125=245=4.8x = 2 \times \frac{12}{5} = \frac{24}{5} = 4.8 Thus, x4.8x \approx 4.8, which rounds to 5, matching one of the answer choices.

Step 3: Solve for yy

To solve for yy, multiply both sides of the second proportion by 4: y=4×125=485=9.6y = 4 \times \frac{12}{5} = \frac{48}{5} = 9.6 Thus, y9.6y \approx 9.6, which rounds to 10, also matching one of the answer choices.

Step 4: Conclusion

Based on the calculations, x5x \approx 5 and y10y \approx 10. However, none of the given answer options directly match this, so there might be a rounding issue, or the problem could involve more precise values. Please review the provided answer choices again.

Do you need further clarifications, or is there any other question you'd like to discuss regarding this problem?

5 Related Questions:

  1. How do we determine if triangles are similar?
  2. What is the importance of corresponding sides in solving for unknowns in similar triangles?
  3. Can you solve for unknown angles in similar triangles using proportions?
  4. How do scaling factors affect the area of similar triangles?
  5. Can this method be applied to non-right triangles as well?

Tip:

When working with similar triangles, always match corresponding sides and angles carefully to avoid errors in setting up the proportions.

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Math Problem Analysis

Mathematical Concepts

Geometry
Similar Triangles
Proportions

Formulas

Proportion Formula: a/b = c/d

Theorems

Triangle Similarity Theorem

Suitable Grade Level

Grades 7-10