Math Problem Statement

△JKL∼△PKQ , and KP¯¯¯¯¯¯¯¯=14 m, JK¯¯¯¯¯¯¯¯=56 m, and KQ¯¯¯¯¯¯¯¯=21 m. What is the length of KL¯¯¯¯¯¯¯¯ ?

△JKL∼△PKQ, and KP = 14 m, JK = 56 m, and KQ = 21 m. What is the length of KL?

Solution

The given problem involves two similar triangles, JKL\triangle JKL and PKQ\triangle PKQ, as indicated by JKLPKQ\triangle JKL \sim \triangle PKQ. We are given the following lengths:

  • KP=14mKP = 14 \, \text{m}
  • JK=56mJK = 56 \, \text{m}
  • KQ=21mKQ = 21 \, \text{m}

We need to find the length of KLKL.

Step 1: Use of Similar Triangles

Since JKLPKQ\triangle JKL \sim \triangle PKQ, the corresponding sides of the triangles are proportional. Therefore, we can set up a proportion between the corresponding sides:

JKKP=KLKQ\frac{JK}{KP} = \frac{KL}{KQ}

Substitute the known values:

5614=KL21\frac{56}{14} = \frac{KL}{21}

Step 2: Simplify and Solve for KLKL

Simplifying the left-hand side:

5614=4\frac{56}{14} = 4

Now, solve for KLKL:

4=KL214 = \frac{KL}{21}

Multiply both sides by 21 to isolate KLKL:

KL=4×21=84mKL = 4 \times 21 = 84 \, \text{m}

Thus, the length of KLKL is 84m84 \, \text{m}.


Do you want further details or have any questions on the solution?

Related Questions:

  1. How can we use similar triangles to find unknown angles?
  2. What are the properties of similar triangles in terms of angles and sides?
  3. How do we prove that two triangles are similar?
  4. What is the significance of proportional sides in similar triangles?
  5. How does the Pythagorean theorem relate to right triangles in similarity problems?

Tip:

When dealing with similar triangles, always remember that their corresponding sides are proportional, and their corresponding angles are equal. This property helps in solving many geometry problems involving ratios.

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Math Problem Analysis

Mathematical Concepts

Geometry
Similar Triangles
Proportions

Formulas

(JK / KP) = (KL / KQ)

Theorems

Similarity Theorem (AA Criterion for Similarity)

Suitable Grade Level

Grades 8-10